cleanup dead code of generating Work permanent id

[whitewindmills]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
Since the PR(#4474) has been merged, we're going to remove those codes which generate work permanent ID outside of webhook.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[RainbowMango]

The test is failing.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.17%. Comparing base (4ccffcc) to head (93a04cb).

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4928      +/-   ##
==========================================
- Coverage   53.18%   53.17%   -0.01%     
==========================================
  Files         252      252              
  Lines       20510    20508       -2     
==========================================
- Hits        10909    10906       -3     
  Misses       8882     8882              
- Partials      719      720       +1     

Flag	Coverage Δ
unittests	53.17% <ø> (-0.01%)	⬇️

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[whitewindmills]

please take a look @RainbowMango @XiShanYongYe-Chang

[liangyuanpeng]

This breaks version compatibility, it is recommended to add releast-note for this.

[whitewindmills]

@liangyuanpeng The feature version that enables work permanent ID has not been released yet.

[liangyuanpeng]

thanks for the clarification,make sense!

[XiShanYongYe-Chang]

Thanks~
/lgtm

Is the name of the PR inappropriate?

[RainbowMango]

/retitle cleanup dead code of generating Work permanent id

[RainbowMango]

/approve

[karmada-bot]

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