test: consolidate and rename e2e runner scripts #6065

Job	Run time
check-changes	5s
test	8m 33s
verify-helm-charts	2m 32s
e2e-image-common (builder)	48s
e2e-image-router (renderer)	1m 35s
e2e-image-common (epp)	1m 6s
e2e-image-router (sidecar)	1m 14s
e2e-image-common (simulator)	16s
e2e-gaie (metrics)	7m 7s
e2e-gaie (traffic)	7m 9s
e2e-router (pd)	5m 9s
e2e-router (pd-shared-storage-deprecated)	8m 2s
e2e-router (disruption)	7m 40s
e2e-router (pd-shared-storage-disagg)	4m 45s
e2e-router (pd-metrics)	4m 14s
e2e-router (extended)	10m 55s
	1h 11m 10s

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