[qt/qt/qtcanvaspainter]: Summary of bulk changes made

Git repository change summary for qt/qt/qtcanvaspainter
Pushed by mirror-service into branch '6.12'.
Changed from 8e54287889bb26f87bffa7145bf1a2a9e41d4b17 to 90c9f0fb91746512330629a2fad049de6a886227
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit 1650d6c510682e613f7672af33f2ec8a45015886 by Qt Submodule Update Bot on 05/08/2026 at 00:22..
Update dependencies on '6.12' in qt/qtcanvaspainter

Change-Id: Idb380622ba556e1bd8c7fbc853ae84b979da3ac3
Reviewed-by: Qt Submodule Update Bot <[email protected]>
https://invent.kde.org/qt/qt/qtcanvaspainter/-/commit/1650d6c510682e613f7672af33f2ec8a45015886

Git commit 01119d2c3f0b03e537ea1d2eed04e836fe506762 by Qt Cherry-pick Bot (on behalf of Laszlo Agocs) on 05/08/2026 at 05:24..
Autotest that gradient stop streaming works

Change-Id: Id0849b5f0ce05a8fdfc6c7bf57c06e99c1efb3c0
Reviewed-by: Kaj Grönholm <[email protected]>
(cherry picked from commit 12a149d8d7cef31d6428e257e870257876cb6052)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>
https://invent.kde.org/qt/qt/qtcanvaspainter/-/commit/01119d2c3f0b03e537ea1d2eed04e836fe506762

Git commit 90c9f0fb91746512330629a2fad049de6a886227 by Qt Cherry-pick Bot (on behalf of Kaj Grönholm) on 05/08/2026 at 06:24..
Improvements based on API review

- Don't export gradient brush destructors and make them default.
- Remove 'inline' from method definitions.
- Remove public detach() from brush.
- Remove non-friend debug & stream operators declarations.

Change-Id: I444845c8ebfa00c2be64449d4da6525b3007cc0e
Reviewed-by: Laszlo Agocs <[email protected]>
(cherry picked from commit 83e6d179de2ff319979aa8845fadf37782924376)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>
https://invent.kde.org/qt/qt/qtcanvaspainter/-/commit/90c9f0fb91746512330629a2fad049de6a886227