Refactor GC controller with kubebuilder

[allenxu404]

Thank you for contributing to Velero!

Please add a summary of your change

• Refactor gc controller with kubebuilder

Does your change fix a particular issue?

Fixes #5023

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• Updated the corresponding documentation in site/content/docs/main.

[codecov-commenter]

Codecov Report

Merging #5215 (aa5f389) into main (a71237c) will decrease coverage by 0.46%.
The diff coverage is 40.62%.

@@            Coverage Diff             @@
##             main    #5215      +/-   ##
==========================================
- Coverage   41.60%   41.13%   -0.47%     
==========================================
  Files         215      218       +3     
  Lines       18643    18882     +239     
==========================================
+ Hits         7756     7768      +12     
- Misses      10309    10535     +226     
- Partials      578      579       +1     

Impacted Files	Coverage Δ
pkg/cmd/server/server.go	6.63% <0.00%> (+0.15%)	⬆️
pkg/controller/gc_controller.go	56.31% <46.42%> (-20.01%)	⬇️
pkg/controller/generic_controller.go	8.79% <0.00%> (-63.74%)	⬇️
pkg/install/resources.go	52.31% <0.00%> (-0.25%)	⬇️
pkg/controller/backup_deletion_controller.go	56.74% <0.00%> (ø)
pkg/controller/restic_repository_controller.go	54.36% <0.00%> (ø)
pkg/restic/repository_manager.go
pkg/restic/repository_keys.go
pkg/repository/manager.go	20.40% <0.00%> (ø)
... and 8 more

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