chore: Drop `adminClient` (1/2) #2905

Job	Run time
Check file changes	4s
Run API Tests	3m 4s
Run Integration tests	5m 10s
Build React App	7s
E2E tests	29m 58s
Generate Hasura Change Summary	0s
Run React Tests	0s
Upsert Vultr Instance	7m 16s
Run Pulumi Preview	0s
Run Healthcheck on Pizza Services	0s
	45m 39s

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