feat: add orphaned resource count metric #6391 #34512

Job	Run time
changes	14s
Check changes to generated code	4m 4s
Build & cache Go code	3m 1s
Build, test & lint UI code	1m 40s
Ensure Go modules synchronicity	17s
Lint Go code	3m 4s
Run unit tests for Go packages	5m 1s
Run end-to-end tests (v1.31.0, true)	49m 41s
Run unit tests with -race for Go packages	9m 3s
Run end-to-end tests (v1.30.4, false)	50m 9s
Run end-to-end tests (v1.29.8, false)	49m 42s
Run end-to-end tests (v1.28.13, false)	50m 22s
E2E Tests - Composite result	1s
Process & analyze test artifacts	1m 6s
	3h 47m 25s

Provide feedback