qt_add_test supports now QT_TEST_SERVER_LIST, which will add the test
servers as docker test fixtures.
The docker server will be started before the test is run, and stopped
after the test is run.
Running the tests in parallel is not supported.
Docker tests are currently only supported on Linux hosts.
Task-number: QTBUG-85034
Change-Id: If3cefe05c5dec19c14b05d2fa8b01a0b6d95e259
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
0aa4b33b92