Generate an Event on Backup/Restore Failure

[kaovilai]

Describe the problem/challenge you have

A kubernetes event generated for backup/restore failure would give a more accurate representation as to errors that happened while using velero.

It would survive a velero pod restart unlike the metrics endpoint.

User may have to adjust events TTL to make them live long enough for review.

Describe the solution you'd like

Anything else you would like to add:

Environment:

• Velero version (use velero version):
• Kubernetes version (use kubectl version):
• Kubernetes installer & version:
• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):

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[Lyndon-Li]

Discussed in #6606, see more details there.

[weshayutin]

@kaovilai thanks for writing this up, not sure which issue work will fold into but this is def something customers want! ++

[kaovilai]

Closing as duplicate