EXPERIMENT: Change workload name generation to ensure max 63 characters (enable default).

[mbobrovskyi]

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[k8s-ci-robot]

Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mbobrovskyi
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[k8s-ci-robot]

@mbobrovskyi: 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-verify-main	29a3d6a	link	true	/test pull-kueue-verify-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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[mwielgus]

Add comment why 63.