Persist include-submodules flag when using GitStorage #15966

Job	Run time
docker, python:3.9	5m 15s
docker, python:3.10	5m 0s
Server Tests - python:3.9, postgres:14	3m 35s
Server Tests - python:3.10, postgres:14	3m 39s
Server Tests - python:3.11, postgres:14	3m 33s
docker, python:3.11	5m 7s
Server Tests - python:3.12, postgres:14	3m 42s
docker, python:3.12	5m 27s
Server Tests - python:3.9, sqlite	5m 22s
Server Tests - python:3.10, sqlite	5m 4s
Server Tests - python:3.11, sqlite	5m 0s
Server Tests - python:3.12, sqlite	5m 21s
Client Tests - python:3.9, postgres:14	6m 57s
Client Tests - python:3.10, postgres:14	6m 52s
Client Tests - python:3.11, postgres:14	6m 24s
Client Tests - python:3.12, postgres:14	6m 59s
	1h 23m 17s

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