Add missing label servicemonitor #6566

Job	Run time
End-to-end tests e2e on K8s 1.23	5m 24s
End-to-end tests e2e-instrumentation on K8s 1.23	7m 50s
End-to-end tests e2e-upgrade on K8s 1.23	4m 59s
End-to-end tests e2e-autoscale on K8s 1.23	4m 51s
End-to-end tests e2e-pdb on K8s 1.23	6m 24s
End-to-end tests e2e-opampbridge on K8s 1.23	4m 39s
End-to-end tests e2e-targetallocator on K8s 1.23	5m 45s
End-to-end tests e2e-prometheuscr on K8s 1.23	11m 11s
End-to-end tests e2e-multi-instrumentation on K8s 1.23	6m 15s
End-to-end tests e2e on K8s 1.29	6m 0s
End-to-end tests e2e-instrumentation on K8s 1.29	6m 8s
End-to-end tests e2e-upgrade on K8s 1.29	5m 19s
End-to-end tests e2e-autoscale on K8s 1.29	4m 45s
End-to-end tests e2e-pdb on K8s 1.29	6m 15s
End-to-end tests e2e-opampbridge on K8s 1.29	4m 47s
End-to-end tests e2e-targetallocator on K8s 1.29	6m 9s
End-to-end tests e2e-prometheuscr on K8s 1.29	9m 35s
End-to-end tests e2e-multi-instrumentation on K8s 1.29	6m 15s
e2e-tests-check	1s
	1h 52m 32s

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