[SPARK-60042] Support Kueue admission check podSetUpdates

[dongjoon-hyun]

What changes were proposed in this pull request?

This PR aims to support Kueue admission check podSetUpdates like the Kueue built-in integrations. The labels, annotations, nodeSelector and tolerations which the admission checks report in status.admissionChecks[].podSetUpdates of a Workload are merged with the flavors and applied to the pods of SparkApplication and SparkCluster. A conflicting value fails the resource with SchedulingFailure, like a node label conflict of the flavors.

Why are the changes needed?

Previously, the operator applied only the flavors. So, the pods admitted through a ProvisioningRequest admission check lacked its annotations and node selector, and were not bound to the provisioned capacity.

Does this PR introduce any user-facing change?

No for the released versions, because the Kueue integration is not released yet in 1.0.0 (2026-07-23).

How was this patch tested?

Pass the CIs with the newly added test cases.

Was this patch authored or co-authored using generative AI tooling?

Generated-by: Claude Opus 5.5

[dongjoon-hyun]

All tests passed. Could you review this PR when you have some time, @peter-toth ?

[peter-toth]

Thanks for the PR, @dongjoon-hyun!

This merges the podSetUpdates of the admission checks into the resolved flavors and applies them to the pod templates of both resources. Traced against Kueue v0.20.0, it matches getPodSetsInfoFromStatus and PodSetInfo.Merge in which update is used, in what order, and what counts as a conflict. Not checking the state of each check is safe. Kueue drops Admitted as soon as a check leaves Ready, and its webhook keeps podSetUpdates immutable while a check is Ready. I found nothing blocking.

Minor

• 1. KueuePodSetFlavor name: the record now also carries the admission-check updates, so a name like Kueue's PodSetInfo would fit better. inline

[peter-toth]

Finding 1. The record now also holds the labels, annotations, nodeSelector and tolerations of the admission checks, so Flavor no longer describes what's in it. Kueue keeps the same merged shape in podset.PodSetInfo. Renaming it to KueuePodSetInfo would say what it holds. The Kueue integration isn't released yet, so a rename is cheap now. A follow-up PR is fine too.

[dongjoon-hyun]

Thank you, @peter-toth. I renamed it to KueuePodSetInfo in this PR, along with the members which hold or produce it, e.g. setKueuePodSetInfos and resolvePodSetInfos.

[dongjoon-hyun]

Merged to main