feat: add orphaned resource count metric (#20521) #34669

Job	Run time
changes	5s
Lint Go code	3m 10s
Ensure Go modules synchronicity	14s
Build, test & lint UI code	1m 37s
Build & cache Go code	3m 2s
Check changes to generated code	4m 24s
Run unit tests for Go packages	5m 8s
Run unit tests with -race for Go packages	9m 20s
Run end-to-end tests (v1.31.0, true)	51m 19s
Run end-to-end tests (v1.30.4, false)	49m 48s
Run end-to-end tests (v1.29.8, false)	50m 1s
Run end-to-end tests (v1.28.13, false)	50m 21s
E2E Tests - Composite result	1s
Process & analyze test artifacts	1m 29s
	3h 49m 59s

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