ebs br: fail delete cr operation if backup meta is missing (#5199)

[ti-chi-bot]

This is an automated cherry-pick of #5199

What problem does this PR solve?

Closes #5196
Closes #5159

What is changed and how does it work?

If backup meta file doesn't exist during backup cr deletion, we should fail the backup cr deletion and remind users to do manual snapshots deletion.

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

[ti-chi-bot]

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