Use <QtModule/qheader.h> style in public headers


The quoted style was giving build warnings when building with the
-Wquoted-include-in-framework-header warning enabled, which for
example the Xcode modules-verifier tool does.

Task-number: QTBUG-107193
Pick-to: 6.12 6.11 6.8
Change-Id: I5afd6b3d1807de785d884cf2ce3045709406baf0
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commitc121d172cd81ffa9248c675e6e4004ccbd33a404
parent985026faaae5b6fde4c433a2b06f07a106dfd745
authorTor Arne Vestbø <tor.arne.vestbo@qt.io>
committerTor Arne Vestbø <tor.arne.vestbo@qt.io>
commit timeMon, 24 Aug 2026 12:26:30 +0000