Tests: Add standalone test configuration preamble


Add the boilerplate standalone test prelude to each test, so that
they can be configured with cmake or qt-cmake directly without the
qt-cmake-standalone-test script.

Task-number: QTBUG-93020
Change-Id: Ic87ae8eaefa8b41d8c8bac5283c9d130f1c765f6
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commit1e499a5cd6f2f58ee1f0a44bb20c226ca85d0dc3
parent2c193b2dd7bf29b04ed35e2e70be9c49238c8d62
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeFri, 28 Aug 2026 11:05:58 +0000