Automated cherry pick of #4144: fix: cannot access ResourceRegistry with its singularName

[Yan-Daojiang]

Cherry pick of #4144 on release-1.6.
#4144: fix: cannot access ResourceRegistry with its singularName
For details on the cherry pick process, see the cherry pick requests page.

`karmada-search`:  fix cannot access ResourceRegistry with its singularName.

[karmada-bot]

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[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (d3f187c) 54.32% compared to head (d377c1f) 54.32%.

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Additional details and impacted files

@@             Coverage Diff              @@
##           release-1.6    #4154   +/-   ##
============================================
  Coverage        54.32%   54.32%           
============================================
  Files              223      223           
  Lines            21303    21303           
============================================
  Hits             11572    11572           
  Misses            9106     9106           
  Partials           625      625           

Flag	Coverage Δ
unittests	54.32% <0.00%> (ø)

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Files	Coverage Δ
pkg/registry/search/storage/resourceregistry.go	0.00% <0.00%> (ø)

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