ipam: add GC option for running pods with empty podIPs

[weizhoublue]

robot cherry pick PR #4889 from cyclinder,to branch release-v1.0, action https://github.com/spidernet-io/spiderpool/actions/runs/15151807669 , commits 0cada92

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.21%. Comparing base (8f95f65) to head (65063c3).
Report is 1 commits behind head on release-v1.0.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-v1.0    #4897   +/-   ##
=============================================
  Coverage         75.21%   75.21%           
=============================================
  Files                56       56           
  Lines              6782     6782           
=============================================
  Hits               5101     5101           
  Misses             1468     1468           
  Partials            213      213           

Flag	Coverage Δ
unittests	75.21% <ø> (ø)

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