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: I95540590a1cb3ba72a43aedc0d9b3b8603d287fc
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commita956315f67515f26fa0a9364bde390d925c69c94
parente2f6d82cbb373260678926cbef60de8f209c4ac2
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeSat, 29 Aug 2026 05:51:24 +0000