cherry-pick for 0.10: fix: propagate priority-class label for deploy and statefulset

[Abirdcfly]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Due to file modification conflicts, cherry-pick was manually performed at #3980

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Propagate the top-level setting of the `kueue.x-k8s.io/priority-class` label to the PodTemplate for
Deployments and StatefulSets. This way the Workload Priority class is no longer ignored by the workloads.

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

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[mimowo]

/retitle cherry-pick for 0.10: fix: propagate priority-class label for deploy and statefulset

so that it can be immediately seen what is the PR about just by the title

[mimowo]

/ok-to-test
/test all

[mimowo]

/lgtm
/approve
Thanks!

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: a60ce5b78776f1abae824666af42bd289a2078d4

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Abirdcfly, mimowo

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