Fix generateName for StatefulSets by including UID in workload name

[IrvingMg]

What type of PR is this?

/kind bug

What this PR does / why we need it:

GetWorkloadName previously used only the StatefulSet name with an empty UID, causing workload name collisions when multiple StatefulSets shared a generateName prefix. This PR now includes the UID in the workload name hash.

Since the UID is not available at webhook time, labels that depend on the workload name have been moved from the webhook to the reconciler.

For MultiKueue compatibility, this PR adds GetOwnerUID (following the LWS pattern) so that worker-cluster copies use the management cluster’s UID via MultiKueueOriginUIDAnnotation.

Which issue(s) this PR fixes:

Fixes #8687

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Fix StatefulSets with generateName producing the same workload name.

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: IrvingMg
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[IrvingMg]

@DavideRutigliano @mbobrovskyi PTAL

[k8s-ci-robot]

@IrvingMg: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kueue-test-e2e-multikueue-main	6002a6c	link	true	/test pull-kueue-test-e2e-multikueue-main

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[mbobrovskyi]

Suggested change

	remoteStatefulSet.Annotations = map[string]string{}
	remoteStatefulSet.Annotations = make(map[string]string, 1)

[mimowo]

@IrvingMg do you understand the issue behind the e2e tests failing https://prow.k8s.io/view/gs/kubernetes-ci-logs/pr-logs/pull/kubernetes-sigs_kueue/9091/pull-kueue-test-e2e-multikueue-main/2023423325627224064? Do we have a path forward for fixing it?

[IrvingMg]

@IrvingMg do you understand the issue behind the e2e tests failing https://prow.k8s.io/view/gs/kubernetes-ci-logs/pr-logs/pull/kubernetes-sigs_kueue/9091/pull-kueue-test-e2e-multikueue-main/2023423325627224064? Do we have a path forward for fixing it?

Yes, I’ve been looking into it and am currently working on the fix. The issue seems to be related to splitting the reconciliation process after adding the StatefulSet pod reconciler, which is causing the workload to miss the StatefulSet owner reference.