Use v4 action when uploading artifacts #2429

Job	Run time
sonarcloud	2m 49s
setup-tags	8s
build	1m 11s
snyk scan	1m 12s
ARM Migration / build-and-push	5m 37s
AMD Migration / build-and-push	2m 36s
ARM Aggregator / build-and-push	3m 41s
AMD Aggregator / build-and-push	2m 30s
AMD Gateway / build-and-push	4m 27s
ARM Gateway / build-and-push	3m 45s
Aggregator / Join Image	14s
Gateway / Join Image	15s
Migration / Join Image	12s
deploy-pr	12s
ephemeral-deploy-and-test	0s
	28m 49s

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