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: I2dbc048eeae8fabcd8fc86edd0aca7d1e3108bd3
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commit708d53c5659f9222c0836930b386721219f08fb9
parentb5f43c1a2e24493597121e7c073f8bb43d616f61
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeSat, 29 Aug 2026 05:51:32 +0000