Set a timeout of 300s for all e2e tests #6495

Job	Run time
End-to-end tests e2e on K8s 1.23	10m 44s
End-to-end tests e2e-instrumentation on K8s 1.23	10m 38s
End-to-end tests e2e-upgrade on K8s 1.23	10m 17s
End-to-end tests e2e-autoscale on K8s 1.23	8m 40s
End-to-end tests e2e-pdb on K8s 1.23	9m 19s
End-to-end tests e2e-opampbridge on K8s 1.23	6m 58s
End-to-end tests e2e-prometheuscr on K8s 1.23	7m 51s
End-to-end tests e2e-multi-instrumentation on K8s 1.23	8m 14s
End-to-end tests e2e on K8s 1.29	8m 16s
End-to-end tests e2e-instrumentation on K8s 1.29	8m 48s
End-to-end tests e2e-upgrade on K8s 1.29	7m 32s
End-to-end tests e2e-autoscale on K8s 1.29	7m 11s
End-to-end tests e2e-pdb on K8s 1.29	8m 18s
End-to-end tests e2e-opampbridge on K8s 1.29	7m 0s
End-to-end tests e2e-prometheuscr on K8s 1.29	7m 43s
End-to-end tests e2e-multi-instrumentation on K8s 1.29	8m 8s
e2e-tests-check	1s
	2h 15m 38s

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