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: Idea4baba68eb906212124bf3263535117165dc9a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commitfe3e501a188d8a758b232a2daf4e8ce604222650
parentc2bfc4dc4586cbf32ba355ee92e1cdec4350eb51
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeFri, 28 Aug 2026 11:05:53 +0000