CI: Run gen-server tests with Postgres #3215

Job	Run time
build_and_test (3.11, 22.x, :lint:python:client:common:smoke:stubs:)	5m 4s
build_and_test (3.11, 22.x, :server-1-of-2:)	6m 51s
build_and_test (3.11, 22.x, :server-2-of-2:)	9m 39s
build_and_test (3.11, 22.x, :gen-server:)	5m 34s
build_and_test (3.11, 22.x, :nbrowser-^[A-D]:)	10m 32s
build_and_test (3.11, 22.x, :nbrowser-^[E-L]:)	9m 35s
build_and_test (3.11, 22.x, :nbrowser-^[M-N]:)	12m 4s
build_and_test (3.11, 22.x, :nbrowser-^[O-R]:)	5m 21s
build_and_test (3.11, 22.x, :nbrowser-^[^A-R]:)	6m 59s
build_and_test (:lint:python:client:common:smoke:, 22.x, 3.10)	4m 35s
candidate	0s
	1h 16m 14s

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