ebs: calc full snapshot size and report backup size for failed backup (#5007)

[ti-chi-bot]

This is an automated cherry-pick of #5007

What problem does this PR solve?

Closes #4993

What is changed and how does it work?

1. Backup size attribute of a backup CR is now the expected size after restore instead of the delta.
2. Backup size will be reported for both successful and failed ebs backup job
3. No need to recalculate backupsize at clean time

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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[codecov-commenter]

Codecov Report

Merging #5138 (caa4a67) into release-1.5 (357c02d) will increase coverage by 0.56%.
The diff coverage is 57.18%.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.5    #5138      +/-   ##
===============================================
+ Coverage        57.23%   57.79%   +0.56%     
===============================================
  Files              246      248       +2     
  Lines            28697    28886     +189     
===============================================
+ Hits             16424    16694     +270     
+ Misses           10682    10566     -116     
- Partials          1591     1626      +35     

Flag	Coverage Δ
unittest	57.79% <57.18%> (+0.56%)	⬆️