Update operator CRDs to include extraLabels

[jdoupe]

Description

This brings in the CRD changes to vitess-operator branch of the same name.
planetscale/vitess-operator#735

Related Issue(s)

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
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• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

Deployment Notes

AI Disclosure

[vitess-bot]

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[promptless]

Promptless prepared a documentation update related to this change.

Triggered by vitessio/vitess#19794

Added documentation for the new extraLabels feature in operator CRDs, explaining how users can add custom Kubernetes labels to backup-related resources including VitessBackupSchedule, VitessBackupStorage, and VitessCluster backup pods.

Review at https://app.gopromptless.ai/suggestions/1f266a6f-6d9e-4f3c-8c93-ee4ac1870a37