feat: added Argo version info in /metrics endpoint

[smaloo-salesforce]

Signed-off-by: Siddharth Maloo [email protected]

Checklist:

• 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, (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.
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[smaloo-salesforce]

Hi @alexmt @jessesuen
Kindly approve this one and include in upcoming release (old Reference #1600)
Thank you.

[huikang]

Hi, @alexmt , could you consider merging this more for the next patch release? Thanks.

[alexmt]

Looks go to me

[jessesuen]

Nits:

1. Can we rename this argo_rollouts_controller_info ? Because we might have a metric endpoint for dashboard in the future and should be more specific about the component
2. Label can just be version (this is what prometheus does)

			Name:        "argo_rollouts_controller_info",
			Help:        "Running Argo-rollouts version",
			ConstLabels: prometheus.Labels{"version": version.GetVersion().Version},

[smaloo-salesforce]

Updated as suggested. Please check

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #1662 (0fb93f1) into master (6edc9c8) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1662      +/-   ##
==========================================
- Coverage   81.99%   81.99%   -0.01%     
==========================================
  Files         115      116       +1     
  Lines       15913    15929      +16     
==========================================
+ Hits        13048    13061      +13     
- Misses       2196     2198       +2     
- Partials      669      670       +1     

Impacted Files	Coverage Δ
controller/metrics/metrics.go	100.00% <100.00%> (ø)
controller/metrics/prommetrics.go	100.00% <100.00%> (ø)
rollout/trafficrouting/istio/controller.go	50.81% <0.00%> (-1.63%)	⬇️
utils/conditions/conditions.go	80.76% <0.00%> (ø)
rollout/sync.go	78.29% <0.00%> (+0.36%)	⬆️

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