Add nodelatencystats rest apis implementation. #33611

Job	Run time
Check whether tests need to be run based on diff	14s
Verify docs and spelling	29s
Unit test (ubuntu-latest)	6m 51s
Integration test	5m 13s
Unit test (windows-2022)	14m 31s
Build Antrea and antctl binaries	9m 47s
Go benchmark test	4m 46s
Golangci-lint (macos-latest)	3m 3s
Golangci-lint (ubuntu-latest)	8m 24s
Check tidy, code generation and manifest	5m 37s
Build Antrea Windows binaries	1m 58s
	1h 0m 53s

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