fix deep equal check failure in CreateOrUpdateWork(), by replace the marshaler

[zach593]

What type of PR is this?

/kind bug

What this PR does / why we need it:
see #5938

Which issue(s) this PR fixes:
Fixes #5938

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[karmada-bot]

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Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 48.10%. Comparing base (a6df137) to head (afc1a3c).

Files with missing lines	Patch %	Lines
pkg/util/helper/work.go	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5939   +/-   ##
=======================================
  Coverage   48.09%   48.10%           
=======================================
  Files         663      663           
  Lines       54769    54769           
=======================================
+ Hits        26340    26345    +5     
+ Misses      26719    26713    -6     
- Partials     1710     1711    +1     

Flag	Coverage Δ
unittests	48.10% <0.00%> (+<0.01%)	⬆️

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