chore: Drop `adminClient` (1/2) #2930

Job	Run time
Check file changes	12s
Run API Tests	3m 59s
Run Integration tests	7m 6s
Run React Tests	0s
Build React App	8s
Generate Hasura Change Summary	9s
E2E tests	10m 33s
Upsert Vultr Instance	8m 23s
Run Pulumi Preview	0s
Run Healthcheck on Pizza Services	33s
	31m 3s

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