chore: moving to otel from opencensus #7714

Job	Run time
Build and Test (1.25.8)	7m 17s
[Generator Resource Expansion] Build and Test	7m 8s
Build and Test (1.26.3)	6m 49s
Check codegen and manifest	2m 27s
Build and Test (1.27.1)	6m 55s
Test Gator	2m 41s
Build and Test (1.28.0)	7m 31s
[Helm] Build and Test (3.7.2, gatekeeper-system)	5m 41s
Lint	3m 8s
Unit test	7m 46s
[Helm] Build and Test (3.7.2, custom-namespace)	5m 47s
	1h 3m 10s

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