Migrate CircleCI unit test workflow to Github Actions

[shovnik]

Which problem is this PR solving?

• This addresses issue by migrating the remaining opentelemetry-js workflow from CircleCI to GitHub Actions (backwards compatibility, canary, docs and lint workflows are already on GHA)
• This also standardizes the triggers for CI workflows on opentelemetry-js

Short description of the changes

• Migrates node-unit-tests and browser-unit-tests contained in config.yml file to Github Actions
• Standardized setting of triggers for all CI jobs to be on pull_request and push to master branch. Removed the current overlapping pull_request/push triggers.

Migration Plan

I suggest having CircleCI and GitHub Action jobs run in parallel for a few weeks. After the GitHub Action jobs are running fine for a week or so and then remove the CircleCI workflows from config.yml

Note: Related PR migrating the corresponding config.yml file in the opentelemetry-js-contrib repo.

cc - @alolita

[codecov]

Codecov Report

Merging #1711 (3949c26) into master (433b15c) will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1711      +/-   ##
==========================================
+ Coverage   91.84%   91.91%   +0.07%     
==========================================
  Files         167      167              
  Lines        5567     5567              
  Branches     1183     1183              
==========================================
+ Hits         5113     5117       +4     
+ Misses        454      450       -4     

Impacted Files	Coverage Δ
...ges/opentelemetry-instrumentation-http/src/http.ts	95.49% <0.00%> (+0.81%)	⬆️
...etry-exporter-prometheus/src/PrometheusExporter.ts	91.80% <0.00%> (+1.63%)	⬆️
...emetry-core/src/platform/node/RandomIdGenerator.ts	93.75% <0.00%> (+6.25%)	⬆️

[dyladan]

I think this line is supposed to be in the stragegy section

[shovnik]

Slight slip (didn't notice since test passed). Fixed

[dyladan]

Test didn't actually run

[shovnik]

I might have added it last second then 😅 It should be working now.

[dyladan]

I notice you didn't remove circleci. Was that on purpose?

[shovnik]

Yes, it was intentional to have them running in parallel for a week for comparison, but I suppose logs can be viewed for that purpose. Removing ci.yml config file. I deleted the file, but to actually remove CircleCI from the repo, a maintainer needs to remove the CircleCi webhook in the repository settings before merging this PR.

[shovnik]

Can this PR and the related contrib PR (open-telemetry/opentelemetry-js-contrib#272) be merged now that they are approved and rebased?

[dyladan]

@shovnik I was about to merge this but I don't have permission to fix the conflict.

[shovnik]

@dyladan I just fixed the conflict. Let me know if there are any other issues.