Automatically run a server in a subprocess if no API URL is specified #15838

Job	Run time
docker, python:3.9	5m 9s
Server Tests - python:3.9, postgres:14	3m 40s
docker, python:3.10	5m 17s
Server Tests - python:3.10, postgres:14	3m 41s
docker, python:3.11	5m 7s
Server Tests - python:3.11, postgres:14	3m 26s
docker, python:3.12	5m 22s
Server Tests - python:3.12, postgres:14	3m 40s
Server Tests - python:3.9, sqlite	5m 18s
Server Tests - python:3.10, sqlite	4m 55s
Server Tests - python:3.11, sqlite	4m 41s
Server Tests - python:3.12, sqlite	5m 16s
Client Tests - python:3.9, postgres:14	6m 35s
Client Tests - python:3.10, postgres:14	6m 38s
Client Tests - python:3.11, postgres:14	6m 21s
Client Tests - python:3.12, postgres:14	6m 36s
	1h 21m 42s

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