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: Iff845242c6f7b352774c2b89d569194fc58cd9b1
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commit361566106e714fb4f5a6bfdab2c2038ad65fa51c
parent4b0f125f0b38fcdfec2c2c069dd7404162006aa0
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeFri, 28 Aug 2026 11:04:56 +0000