Set a timeout of 300 for all e2e tests (#2594) #6497

Job	Run time
End-to-end tests e2e on K8s 1.23	10m 18s
End-to-end tests e2e-instrumentation on K8s 1.23	10m 24s
End-to-end tests e2e-upgrade on K8s 1.23	7m 42s
End-to-end tests e2e-autoscale on K8s 1.23	8m 48s
End-to-end tests e2e-pdb on K8s 1.23	7m 12s
End-to-end tests e2e-opampbridge on K8s 1.23	7m 35s
End-to-end tests e2e-prometheuscr on K8s 1.23	7m 35s
End-to-end tests e2e-multi-instrumentation on K8s 1.23	8m 38s
End-to-end tests e2e on K8s 1.29	8m 21s
End-to-end tests e2e-instrumentation on K8s 1.29	9m 35s
End-to-end tests e2e-upgrade on K8s 1.29	7m 44s
End-to-end tests e2e-autoscale on K8s 1.29	7m 13s
End-to-end tests e2e-pdb on K8s 1.29	6m 52s
End-to-end tests e2e-opampbridge on K8s 1.29	6m 54s
End-to-end tests e2e-prometheuscr on K8s 1.29	8m 0s
End-to-end tests e2e-multi-instrumentation on K8s 1.29	8m 3s
e2e-tests-check	1s
	2h 10m 55s

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