feat(controller): add canary steps plugin

[agaudreault]

Implementation of #3480
Related to #2685

Additional work

The following work can be done in subsequent pull request to facilitate the review of the feature

• Create Official step plugin example with best practice in argoproj-labs
• Configurable defaults for error, requeue and minRequeue.
• Health status in ArgoCD should reflect the "cause"
• ArgoCD UI extensions to add plugin step information
• Run step plugin e2e on CI
• Allow to reload config without restarting container
• Documentation
  • Explain step plugin behavior
  • Explain configuration
  • Example repository

Other

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional with a list of types and scopes found here, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

[github-actions]

Go Published Test Results

2 241 tests   2 241 ✅  2m 57s ⏱️
  128 suites      0 💤
    1 files        0 ❌

Results for commit 1fda169.

♻️ This comment has been updated with latest results.

[github-actions]

E2E Tests Published Test Results

  4 files    4 suites   3h 27m 50s ⏱️
111 tests  98 ✅  7 💤  6 ❌
466 runs  416 ✅ 28 💤 22 ❌

For more details on these failures, see this check.

Results for commit 1fda169.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 75.09960% with 125 lines in your changes are missing coverage. Please review.

Project coverage is 78.14%. Comparing base (8405f2e) to head (b1d0963).
Report is 102 commits behind head on master.

❗ Current head b1d0963 differs from pull request most recent head 1fda169. Consider uploading reports for the commit 1fda169 to get more accurate results

Files	Patch %	Lines
rollout/steps/plugin/client/client.go	0.00%	44 Missing ⚠️
rollout/steps/plugin/resolver.go	0.00%	22 Missing ⚠️
rollout/stepplugin.go	86.71%	10 Missing and 9 partials ⚠️
rollout/steps/plugin/plugin.go	88.97%	10 Missing and 5 partials ⚠️
utils/plugin/types/steps.go	0.00%	9 Missing ⚠️
rollout/canary.go	50.00%	3 Missing and 1 partial ⚠️
utils/config/config.go	85.18%	2 Missing and 2 partials ⚠️
utils/plugin/plugin.go	63.63%	2 Missing and 2 partials ⚠️
rollout/steps/plugin/rpc/rpc.go	97.50%	1 Missing and 1 partial ⚠️
metricproviders/plugin/client/client.go	0.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3521      +/-   ##
==========================================
- Coverage   81.83%   78.14%   -3.70%     
==========================================
  Files         135      165      +30     
  Lines       20688    18867    -1821     
==========================================
- Hits        16931    14744    -2187     
- Misses       2883     3199     +316     
- Partials      874      924      +50     

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[agaudreault]

Should I configure E2E by default with a valid step plugin

[sonarcloud]

Quality Gate failed

Failed conditions
B Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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