Adding extra pod labels to post-upgrade and post-delete hook job pods

[mvbrock]

Adding extra pod labels to the post-upgrade and post-delete hook job pods. Verified that the labels show up in the post delete hook when uninstalling the kube-agent Helm chart:

metadata:
  annotations:
    testLabel: testValue

Fixes: #45114
Changelog: Ensure that additional pod labels are carried over to post-upgrade and post-delete hook job pods when using the teleport-kube-agent Helm chart.

[github-actions]

The PR changelog entry failed validation: Changelog entry not found in the PR body. Please add a "no-changelog" label to the PR, or changelog lines starting with changelog: followed by the changelog entries for the PR.

[tigrato]

Please check the HELM tests job because they are currently failing:
https://github.com/gravitational/teleport/actions/runs/10618573216/job/29434142089?pr=46029

The changelog should be a customer-focused message that clearly communicates what has changed, such as:

Changelog: Ensure that additional pod labels are carried over to post-upgrade and post-delete hook job pods when using the teleport-kube-agent Helm chart.

[tigrato]

I think we can remove this hook because it was only important for v10--> v11 migration.
Since we are in v16 and v11 is not supported since v14, it should be fine to delete the whole hook

[jakule]

LGTM

[tigrato]

After debugging a situation with a customer, I realized this is still useful. can you please re-add it and add support for the annotations and labels?

sorry about the confusion

[mvbrock]

No problem at all

[tigrato]

Thanks!

[public-teleport-github-review-bot]

@mvbrock See the table below for backport results.

Branch	Result
branch/v14	Failed
branch/v15	Create PR
branch/v16	Create PR