internal/manifests/collector: switch internally to v1alpha2 #6496

Job	Run time
End-to-end tests e2e on K8s 1.23	9m 11s
End-to-end tests e2e-instrumentation on K8s 1.23	9m 48s
End-to-end tests e2e-upgrade on K8s 1.23	7m 38s
End-to-end tests e2e-autoscale on K8s 1.23	7m 2s
End-to-end tests e2e-pdb on K8s 1.23	7m 7s
End-to-end tests e2e-opampbridge on K8s 1.23	7m 1s
End-to-end tests e2e-prometheuscr on K8s 1.23	7m 35s
End-to-end tests e2e-multi-instrumentation on K8s 1.23	8m 31s
End-to-end tests e2e on K8s 1.29	8m 16s
End-to-end tests e2e-instrumentation on K8s 1.29	8m 25s
End-to-end tests e2e-upgrade on K8s 1.29	7m 22s
End-to-end tests e2e-autoscale on K8s 1.29	7m 13s
End-to-end tests e2e-pdb on K8s 1.29	7m 0s
End-to-end tests e2e-opampbridge on K8s 1.29	6m 58s
End-to-end tests e2e-prometheuscr on K8s 1.29	7m 27s
End-to-end tests e2e-multi-instrumentation on K8s 1.29	8m 11s
e2e-tests-check	1s
	2h 4m 46s

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