[cherry-pick] fix: Spiderpool GC incorrect IP address during statefulset Pod scale up/down, causing IP conflict

[ty-dc]

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What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #3900

Special notes for your reviewer:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.49%. Comparing base (8d8eae6) to head (7e86192).
Report is 4 commits behind head on release-v0.8.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-v0.8    #3914      +/-   ##
================================================
+ Coverage         81.41%   81.49%   +0.07%     
================================================
  Files                49       49              
  Lines              4311     4340      +29     
================================================
+ Hits               3510     3537      +27     
- Misses              640      641       +1     
- Partials            161      162       +1     

Flag	Coverage Δ
unittests	81.49% <100.00%> (+0.07%)	⬆️

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Files	Coverage Δ
...orkloadendpointmanager/workloadendpoint_manager.go	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes