chore: validate sharding restore and incremental backups

[loomts]

resolved https://github.com/apecloud/apecloud/issues/15368
fix sharding restore and inc backup issues

• restore: if current shards>backup target, can do restore, and skip the extra shards.
• incremental backup: if latest backup shards(get from cluster snapshot) != current shards, cannot do incremental backup

[apecloud-bot]

Auto Cherry-pick Instructions

Usage:
  - /nopick: Not auto cherry-pick when PR merged.
  - /pick: release-x.x [release-x.x]: Auto cherry-pick to the specified branch when PR merged.

Example:
  - /nopick
  - /pick release-1.0

[apecloud-bot]

This branch name is not following the standards: feature/|bugfix/|release/|hotfix/|support/|releasing/|dependabot/

[apecloud-bot]

This branch name is not following the standards: feature/|bugfix/|release/|hotfix/|support/|releasing/|dependabot/

[codecov]

Codecov Report

❌ Patch coverage is 35.71429% with 54 lines in your changes missing coverage. Please review.
✅ Project coverage is 51.72%. Comparing base (a24a1e6) to head (9639725).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
...ollers/apps/cluster/transformer_cluster_restore.go	0.00%	23 Missing ⚠️
...rs/dataprotection/backuppolicydriver_controller.go	28.12%	17 Missing and 6 partials ⚠️
controllers/dataprotection/utils.go	80.00%	4 Missing and 1 partial ⚠️
pkg/controller/plan/restore.go	0.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9944      +/-   ##
==========================================
+ Coverage   50.97%   51.72%   +0.75%     
==========================================
  Files         541      541              
  Lines       58289    59006     +717     
==========================================
+ Hits        29712    30522     +810     
+ Misses      25656    25529     -127     
- Partials     2921     2955      +34     

Flag	Coverage Δ
unittests	51.72% <35.71%> (+0.75%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[wangyelei]

why remove it?

[loomts]

cause restore shards count may be larger than backup.targets, when allocateTargetMap == targets, need to add skip annotations for the remaining shards to ensure deterministic status and tell the restore reconciler to skip them