This is a redo of #2833 which is a redo of #2816 (comment).
Do not use a merge commit to update this pull-request with main.

• added directory structure
• npm init
• moved over samples
• passing tests for create, get, delete note and create occurrence
• passing get occurrence test
• passing delete occurrence
• passing test for occurrences for note, flaky
• passing occurrences for image
• samples
• passing get Discovery Info
• passing find vulnerabilities for image
• passing high severity vulnerability test
• pass all vulnerabilities for image
• failing pubsub
• passing pubsub tests
• passing polling test
• updated imageUrl to https://gcr.io/my-project/my-image:123 for more realistic use case
• removed escape slashes from filter strings, not needed
• updated description of occurrenceId
• added comment to explain second filter statement, needed for testing
• explicity state length greater than zero
• removed system-test, moved tests into test directory
• removed async functions from tests without await
• removed unused exec
• removed explicit project id from pub sub
• ran fix
• replaced promise/timeout with p-retry
• changed all samples to be wrapped with an outer main function, added params as comments for user
• added after step to delete occurrences and notes
• updated polling sample and test
• ran fix, dangling errs for symlink and polling
• updated comment on occurrenceId
• fixed typo in discovery test
• grabs projectId from client, update projectId and vars the refer to it in before hooks, added uuid to test resourceUrl
• removed commented code from polling sample
• move end region tag to inside main function
• removed symlinks from test script, removed commented test from polling block
• deleted unused import from pub sub sample
• changed grafeas to container analysis v1beta1 client
• fixed typo in client, removed comment
• added retry logic to get occurrence test
• changed assert match to assert include
• added create topic logic to fix ci test error
• removed regexp from assert include
• changed tests to include arrow functions
• moved containeranalysis and pubsub into prod deps
• added retry logic for all occs of note, check if topic exists and fixed typo on delete occ test
• added sample-metadata
• fixed occurrence typo
• added params to sample-metadata usage
• added p-retry to prod deps, updated poll sample
• working poll discovery occurrence finished sample
• updated default value of retries and timeoutSeconds to be more readable
• refactor: changes formatting of various statements
• chore: release 1.0.0 (Added back datastore v1beta3 samples. #33)
• fix(deps): update dependency @google-cloud/pubsub to ^0.29.0 (Upgrade to latest nodejs LTS release #36)
• chore: release 1.0.1 (Pin engines to Node 4.2. Closes #36. #37)
• chore: release 1.0.2 (Simplify app.yaml files, reduce # of e2e tests, and cleanup for webpa… #40)
• chore: release 1.1.0 (Skip node_modules for better deployments. #44)
• feat: adds getGrafeasClient() method on ContainerAnalysisClient instance (Change 'sampletask' to 'sampleTask' for consistency #46)
• chore: release 1.2.0 (Add property query filtering snippet. #47)
• chore: update samples to reflect v1 Grafeas API (Datastore: Use new Key object to easily reference parts of a key path #48)
• chore: release 1.2.1 (Added instructions for running the tests. Fixes #49. #50)
• chore: release 1.2.2 (Add Prediction API sample. #52)
• docs(samples): Update Topic ID in PubSub sample (Added Pub/Sub samples. #55)
• chore: release 1.3.0 (Move back to container-based Travis builds and removed some redundant tests. #58)
• fix(deps): update dependency @google-cloud/pubsub to ^0.30.0 (Add logging example and link to instructions for Compute Engine as well #59)
• chore: release 1.3.1 (Datastore / CloudSQL samples should only store first two octtets of IP #61)
• chore: release 1.3.2 (Changes for Datastore v1beta3. #68)
• fix(deps): update dependency @google-cloud/pubsub to ^0.31.0 (memcache env vars #71)
• chore: release 1.3.3 (Add sample for brunch #72)
• fix(deps): update dependency @google-cloud/pubsub to ^0.32.0 (Samples/gulp #81)
• chore: release 1.4.0 (Provided comment about done() #78)
• fix(deps): update dependency @google-cloud/pubsub to v1 (Fix metric filter call #84)
• chore: release 1.5.1 (I can commit directly to master #97)
• chore: add license headers for samples (Remove skip_files from app.yaml files #106)
• chore: release 1.6.0 (Add Cloud Speech sample. #110)
• chore: release 1.6.1 (Add Cloud Vision text detection sample. #113)
• refactor: use explicit mocha imports (Remove skip_files from app.yaml files, as it's no longer needed. #119)
• chore: release 1.7.0 (gcloud-node datastore no longer supports "autoPaginate" option #115)
• chore(deps): update dependency mocha to v7 (getApplicationDefault is undefined.  #121)
• chore: release 1.7.1 (Add HTTP Cloud Function. #131)
• feat: move API to typescript code generation (Changed helloworld to camel case #135)
• chore: release 1.8.0 (Add missing sample that got inlined into the docs. #137)
• chore(deps): update dependency uuid to v7
• chore: release 1.9.0 (Add Speech API streaming sample. #144)
• chore: release 1.10.0 (Switch CloudSQL sample to 2nd gen. Added unit tests. #153)
• feat!: drop node8 support, support for async iterators (Update CI settings. #167)
• test: there's a race condition emptying queue (Logging API samples #175)
• test: retry pubsub test, as it relies on many moving parts (Export data from BigQuery samples #186)
• test: retry queue deletion (Update all dependencies 🌴 #191)
• build: adopt CI changes and generator formatting (Add remaining Translate samples. #197)
• test: make tests idempotent (Add browsing data sample #201)
• fix(samples): should use effective_severity field (Fix typo #200)
• chore: release 2.0.0 (Remove output only fields #170)
• build: modified export in protos.js
• chore(deps): update dependency uuid to v8 (Fix asserts and related stubs. #206)
• fix(deps): update dependency @google-cloud/pubsub to v2 (Add quickstart tests #215)
• chore(deps): update dependency mocha to v8 (Fix pagination #222)
• test: attempt retry on note delete (Upgrade tests and samples to ES2015 #224)
• chore: release 2.1.0 (Convert tasks.js to yargs #210)
• chore: release 2.1.1 (Error: Audio 'content' cannot be longer than 1 min. For long audio, use the 'uri' parameter to specify a file. #232)
• docs(samples): update sample to illustrate AR style urls
• chore: release 3.0.0 (Update app.yaml to use instance connection name #264)
• chore: release 3.0.1 (Updating additional swagger API references #268)
• chore: release 3.1.0 (Recognize stream freezes (from example) #278)
• build: update gapic-generator-typescript to v1.2.10. (AssertionError: undefined deepEqual 1 when porting functions/datastore to local setup #284)
• chore: release 3.1.1 (Vision snippets. #294)
• chore: release 3.1.2 (New cloud functions example #299)
• chore: new owl bot post processor docker image (Google Cloud Functions - Private Github repo in package.json #300)
• chore: release 3.1.3 (Sample command's response take too long time #303)
• chore: release 3.1.4 (Removed deprecated flag from app.yaml #309)
• chore: release 3.1.5 (Video samples #319)
• chore: release 3.1.6 (Fix issue with read-only transaction #325)
• chore: release 3.1.7 (speech FLAC encoding not work #327)
• chore: release 3.1.8 (Parallelize DLP tests #337)
• chore: release 3.2.0 (Update translate dependency #340)
• chore: release 3.3.0 (Semantic Text Matching like quora using Google NLP API (question) #353)
• chore(main): release 3.4.0 (Fix CONTRIBUTING.md links not rendering correctly #389)
• fix: Flaky pubsub test (Initial commit of sample #394)
• build!: update library to use Node 12 (Error reporting #408)
• chore(main): release 4.0.0 (Stackdriver samples #407)
• fix(deps): update dependency @google-cloud/pubsub to v3 (Remove "entire video" detection from faces #410)
• chore(main): release 4.1.0 (sendgrid example memory potential leaks #416)
• fix(issue-417): adding additional asserts to track flaky error (Fix bigquery samples #421)
• chore(main): release 4.2.0 (New changes added #MAKE CODE GREAT AGAIN! #422)
• chore(deps): update dependency uuid to v9 (Upgrades language samples to semi-gapic client #435)
• test(samples): disable samples tests for this repository (Added enableWordTimeOffsets: true to async (file) #440)
• chore(main): release 4.3.0 (Fix iot document link #429)
• chore(main): release 4.4.0 ([Speech] README needs autogen update (new Words CLI options are not shown in the README) #444)
• chore(main): release 4.4.1 (unable to do translate image and place text on data bucket #449)