feat!: gateway refactor #11682

Job	Run time
check-deploy	6s
test-docs	2m 16s
cleanup	0s
Check that deploy string doesn't specify a custom component version	3s
deploy-pr	3m 54s
test-pr	5m 48s
test-pr-cypress (publicProject)	6m 42s
test-pr-cypress (privateProject)	10m 21s
test-pr-cypress (updateProjects)	3m 2s
test-pr-cypress (testDatasets)	4m 27s
test-pr-cypress (useSession)	11m 31s
test-pr-cypress (checkWorkflows)	1m 55s
test-pr-cypress (rstudioSession)	4m 34s
	54m 39s

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