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: Ie88e0618578f0b8be1ffd2aa058df9a5a901abec
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commitd12f2489ea3f5b44f3ff65eaecf68152ff78f93c
parent391cfb650c45c1756737aeac11dd0cdc4987c1fc
authorJoerg Bornemann <joerg.bornemann@qt.io>
committerJoerg Bornemann <joerg.bornemann@qt.io>
commit timeFri, 28 Aug 2026 11:06:03 +0000