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: I03ebe80500f403bfd10b9f99c045255d030cb13f
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commita418c195b777375ac2e7921d18f3851529f6bf99
parent3522b4e0e906e1978d0540f03bcdbcde5622abf0
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeTue, 8 Sep 2026 19:25:33 +0000