Added initialisation of creationTimestamp when creating instances of NodeLatencyStats . #33739

Job	Run time
Check whether tests need to be run based on diff	15s
Verify docs and spelling	37s
Integration test	5m 47s
Golangci-lint (ubuntu-latest)	8m 5s
Unit test (ubuntu-latest)	6m 53s
Unit test (windows-2022)	14m 36s
Go benchmark test	5m 15s
Build Antrea and antctl binaries	10m 12s
Golangci-lint (macos-latest)	4m 3s
Check tidy, code generation and manifest	5m 47s
Build Antrea Windows binaries	2m 3s
	1h 3m 33s

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