feat: add job_pods_creation_total metric

[dejanzele]

What type of PR is this?

/kind feature
/sig apps

What this PR does / why we need it:

Adds job_pods_creation_total metric which tracks Pods created by Job controller based on creation event (i.e. specified PodReplacementPolicy(

Which issue(s) this PR fixes:

Part of kubernetes/enhancements#3939

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Add job_pods_creation_total metrics for tracking Pods created by the Job controller labeled by events which triggered the Pod creation

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

- [KEP]: https://github.com/kubernetes/enhancements/issues/3939

[k8s-ci-robot]

This issue is currently awaiting triage.

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[k8s-ci-robot]

Hi @dejanzele. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kannon92]

/ok-to-test

[alculquicondor]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alculquicondor, dejanzele

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/controller/job/OWNERS [alculquicondor]
• test/integration/job/OWNERS [alculquicondor]

Approvers can indicate their approval by writing /approve in a comment
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[alculquicondor]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: d8dd33b44f7dc08ef4e4fb811b88c81b8d24afc9

[alculquicondor]

/retest

[dejanzele]

/test pull-kubernetes-e2e-gce

[alculquicondor]

before retesting, make sure the flakes are reported in issues.