Declare ContainerPort for Target Allocator #5687

Job	Run time
End-to-end tests (1.23, e2e)	14m 32s
End-to-end tests (1.23, e2e-instrumentation)	18m 28s
End-to-end tests (1.23, e2e-upgrade)	13m 22s
End-to-end tests (1.23, e2e-prometheuscr)	8m 39s
End-to-end tests (1.23, e2e-autoscale)	8m 14s
End-to-end tests (1.23, e2e-multi-instrumentation)	14m 3s
End-to-end tests (1.23, e2e-pdb)	13m 10s
End-to-end tests (1.23, e2e-opampbridge)	16m 52s
End-to-end tests (1.28, e2e)	9m 40s
End-to-end tests (1.28, e2e-instrumentation)	18m 58s
End-to-end tests (1.28, e2e-upgrade)	14m 45s
End-to-end tests (1.28, e2e-prometheuscr)	13m 17s
End-to-end tests (1.28, e2e-autoscale)	7m 59s
End-to-end tests (1.28, e2e-multi-instrumentation)	13m 21s
End-to-end tests (1.28, e2e-pdb)	15m 7s
End-to-end tests (1.28, e2e-opampbridge)	15m 24s
e2e-tests-check	1s
	3h 35m 52s

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