[WIP] make cleanup in muliclusterservice controller

[XiShanYongYe-Chang]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 51.68%. Comparing base (2bebae0) to head (7c3aa79).

Files	Patch %	Lines
pkg/util/helper/predicate.go	0.00%	9 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4713      +/-   ##
==========================================
- Coverage   51.70%   51.68%   -0.02%     
==========================================
  Files         247      247              
  Lines       24777    24784       +7     
==========================================
- Hits        12810    12809       -1     
- Misses      11262    11270       +8     
  Partials      705      705              

Flag	Coverage Δ
unittests	51.68% <0.00%> (-0.02%)	⬇️

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