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: I0c9227b131652415e3c824a4a90b301436ce18b3
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commitc5bd2f381116f33e969c574889d472777574e379
parent711ce461e9a0ead63ad0a416a7b992cce450db7a
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeTue, 8 Sep 2026 19:25:47 +0000