Ensure the restore hook applied to new namespace based on the mapping

[reasonerjt]

fixes #4720

Signed-off-by: Daniel Jiang jiangd@vmware.com

• 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 #4779 (2939914) into main (d1fdaec) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #4779   +/-   ##
=======================================
  Coverage   40.86%   40.87%           
=======================================
  Files         202      202           
  Lines       18023    18030    +7     
=======================================
+ Hits         7365     7369    +4     
- Misses      10133    10135    +2     
- Partials      525      526    +1     

Impacted Files	Coverage Δ
internal/hook/item_hook_handler.go	89.40% <100.00%> (+0.21%)	⬆️
pkg/restore/init_restorehook_pod_action.go	54.54% <100.00%> (+2.16%)	⬆️
pkg/controller/backup_controller.go	60.00% <0.00%> (-0.57%)	⬇️

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