Automated cherry pick of #4935: fix: invalid SSA patch due to field manager

[alexeldeib]

Cherry pick of #4935 on release-0.11.

#4935: fix: invalid SSA patch due to field manager

For details on the cherry pick process, see the cherry pick requests page.

Fix a bug which caused Kueue's Scheduler to build invalid SSA patch in some scenarios when  using
admission checks. This patch would be rejected with the following error message: 
Workload.kueue.x-k8s.io "job-xxxxxx" is invalid: [admissionChecks[0].lastTransitionTime: Required value

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[mimowo]

/King bug
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[k8s-ci-robot]

LGTM label has been added.

Git tree hash: a249cfcb70a9a8bbef8e0038a9232f3f0594f6f5

[mimowo]

/kind bug