[ci] refactor cloudwatch metric publishing to avoid needing changes i…

[siddvenk]

…n primary workflows

Description

TLDR: Fixes cw metric publishing for scheduled workflow runs

The problem with the previous implementation of publishing metrics to cw for failed builds is that there is no simple way to parse the overall status of an in progress workflow (previous implementation is broken). To do so, we'd need to annotate each step with an id and parse the steps context, or have each step output it's status and parse all the outputs to determine the status.

Instead, we can use a workflow triggered by the workflow_run event for completed workflows. This triggered workflow can parse the status, name, and repo of the triggering workflow and use that to publish reliable metrics to CloudWatch.

I have tested this in a personal repo here https://github.com/siddvenk/github-workflow-testing/actions/workflows/forking-workflow.yml, and it works as expected.

The other benefit here is we don't have to change any of the existing workflows, or new workflows to include a step to publish metrics. The CW publishing workflow only runs for workflows triggered by the scheduled event on the master branch of the repo.

One thing this does not achieve is publishing fine-grained metrics indicating which step of a workflow failed. That could be nice, but I think it's not necessary since we really just need to be alerted whenever a workflow fails.

[codecov-commenter]

Codecov Report

Attention: 1337 lines in your changes are missing coverage. Please review.

Comparison is base (bb5073f) 72.08% compared to head (bd1c443) 72.29%.
Report is 980 commits behind head on master.

Files	Patch %	Lines
...va/ai/djl/modality/nlp/generate/TextGenerator.java	2.81%	276 Missing ⚠️
.../java/ai/djl/modality/nlp/generate/SeqBatcher.java	0.75%	132 Missing ⚠️
...ity/nlp/generate/ContrastiveSeqBatchScheduler.java	2.97%	98 Missing ⚠️
...i/djl/modality/nlp/generate/SeqBatchScheduler.java	9.83%	55 Missing ⚠️
.../java/ai/djl/modality/cv/BufferedImageFactory.java	40.96%	47 Missing and 2 partials ⚠️
...a/ai/djl/modality/nlp/generate/StepGeneration.java	2.04%	48 Missing ⚠️
api/src/main/java/ai/djl/ndarray/NDArray.java	43.42%	39 Missing and 4 partials ⚠️
...n/java/ai/djl/modality/cv/output/CategoryMask.java	22.00%	39 Missing ⚠️
...i/src/main/java/ai/djl/ndarray/NDArrayAdapter.java	71.21%	31 Missing and 7 partials ⚠️
.../cv/translator/SemanticSegmentationTranslator.java	37.50%	35 Missing ⚠️
... and 74 more

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2974      +/-   ##
============================================
+ Coverage     72.08%   72.29%   +0.20%     
- Complexity     5126     7289    +2163     
============================================
  Files           473      722     +249     
  Lines         21970    32513   +10543     
  Branches       2351     3392    +1041     
============================================
+ Hits          15838    23506    +7668     
- Misses         4925     7386    +2461     
- Partials       1207     1621     +414     

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