refactor: aztec-node json-rpc (#2444)

This PR replaces the HTTP rest API exposed by `rollup-provider` with a
JSON-RPC server for `AztecNode`. ATM the `@aztec/aztec-node` package
exports both the server and client implementation but it might make
sense to move the JSON-RPC client to its own package.

Along the way I had to update some of the models to make them
serialisable to/from strings. I have added tests as needed.

I have also removed `rollup-provider` since that seemed to no longer
used and it was a just thin wrapper around an `AztecNode` and its REST
API.

See also #2358 

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
the PR is ready to merge.
- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [x] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [x] Every change is related to the PR description.
- [x] I have
[linked](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
this pull request to relevant issues (if any exist).

.circleci/config.yml

@@ -671,17 +671,6 @@ jobs:
           name: "Build"
           command: build ethereum
 
-  rollup-provider:
-    machine:
-      image: ubuntu-2004:202010-01
-    resource_class: large
-    steps:
-      - *checkout
-      - *setup_env
-      - run:
-          name: "Build"
-          command: build rollup-provider
-
   e2e-2-rpc-servers:
     machine:
       image: ubuntu-2004:202010-01
@@ -1429,7 +1418,6 @@ workflows:
       - sequencer-client: *yarn_project
       - types: *yarn_project
       - circuits-js: *yarn_project
-      - rollup-provider: *yarn_project
       - aztec-sandbox-base: *yarn_project
       - canary: *yarn_project
 
@@ -1470,7 +1458,6 @@ workflows:
             - sequencer-client
             - types
             - circuits-js
-            - rollup-provider
             - aztec-sandbox-ecr-manifest
             - canary
           <<: *defaults

build_manifest.json

@@ -220,10 +220,6 @@
     "buildDir": "yarn-project",
     "projectDir": "yarn-project/prover-client"
   },
-  "rollup-provider": {
-    "buildDir": "yarn-project",
-    "projectDir": "yarn-project/rollup-provider"
-  },
   "aztec-node": {
     "buildDir": "yarn-project",
     "projectDir": "yarn-project/aztec-node"
@@ -240,4 +236,4 @@
     "buildDir": "yarn-project",
     "projectDir": "yarn-project/world-state"
   }
-}
+}