Recall repo maintenance history on restart

[Lyndon-Li]

Fix issue #7753, recall repo maintenance history on Velero server restart.
Refactor the code to manipulate maintenance job from backupRepository controller and use repo Manager purely as a bridge of repo operations.

[codecov]

Codecov Report

Attention: Patch coverage is 68.83910% with 153 lines in your changes missing coverage. Please review.

Project coverage is 59.35%. Comparing base (3eaa739) to head (91fcb65).
Report is 45 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/repository/maintenance/maintenance.go	70.77%	90 Missing and 12 partials ⚠️
pkg/cmd/cli/repomantenance/maintenance.go	0.00%	31 Missing ⚠️
pkg/controller/backup_repository_controller.go	90.42%	9 Missing ⚠️
pkg/cmd/server/server.go	0.00%	6 Missing ⚠️
pkg/repository/manager/manager.go	54.54%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8580      +/-   ##
==========================================
+ Coverage   59.18%   59.35%   +0.16%     
==========================================
  Files         370      370              
  Lines       39595    39932     +337     
==========================================
+ Hits        23434    23700     +266     
- Misses      14679    14737      +58     
- Partials     1482     1495      +13     

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[reasonerjt]

lgtm, thanks!