Use codegen to generate multicluster base manifests #35947

Job	Run time
Check whether tests need to be run based on diff	17s
Check whether tests need to be run based on diff	17s
Verify docs and spelling	29s
Verify docs and spelling	29s
Golangci-lint (macos-latest)	7m 59s
Golangci-lint (macos-latest)	7m 59s
Golangci-lint (ubuntu-latest)	9m 38s
Golangci-lint (ubuntu-latest)	9m 38s
Integration test	3m 47s
Integration test	5m 51s
Unit test (ubuntu-latest)	7m 57s
Unit test (ubuntu-latest)	7m 57s
Unit test (windows-2022)	9m 44s
Unit test (windows-2022)	9m 44s
Go benchmark test	5m 22s
Go benchmark test	5m 22s
Build Antrea and antctl binaries	13m 50s
Build Antrea and antctl binaries	13m 50s
Check tidy, code generation and manifest	3m 39s
Check tidy, code generation and manifest	3m 39s
Build Antrea Windows binaries	2m 13s
Build Antrea Windows binaries	2m 13s
	2h 11m 54s

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