Record an event when Egress IP assignment changes #30126

Job	Run time
Verify docs and spelling	33s
Check whether tests need to be run based on diff	14s
Unit test (ubuntu-latest)	6m 16s
Golangci-lint (ubuntu-latest)	7m 30s
Integration test	9m 52s
Unit test (windows-2022)	10m 22s
Go benchmark test	4m 33s
Build Antrea and antctl binaries	9m 29s
Golangci-lint (macos-latest)	6m 41s
Build Antrea Windows binaries	1m 52s
Check tidy, code generation and manifest	5m 59s
	1h 3m 21s

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