[FlowAggregator] Add clusterId to aggregated records #35210

Job	Run time
Verify docs and spelling	1m 1s
Check whether tests need to be run based on diff	16s
Unit test (windows-2022)	14m 40s
Unit test (ubuntu-latest)	8m 7s
Build Antrea and antctl binaries	13m 23s
Golangci-lint (macos-latest)	7m 12s
Golangci-lint (ubuntu-latest)	9m 19s
Integration test	5m 54s
Go benchmark test	5m 30s
Check tidy, code generation and manifest	4m 25s
Build Antrea Windows binaries	2m 15s
	1h 12m 2s

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