Tests: Add standalone test configuration preamble to manual tests


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

Task-number: QTBUG-95272
Change-Id: I541945c16d9bb838bd2635f7413ae256cd33b099
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commit920b8ef896c508b5e6a79df12be269e957d0ed15
parent4eb8483b3edb0554f318b1219fc485d483e76fe4
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeTue, 8 Sep 2026 19:26:02 +0000