qt: add version 6.9.0

[gav2xlin]

Summary

Changes to recipe: qt/[6.9.0]

Motivation

This PR contains only the new Qt version.

Details

recipes/qt/6.x.x/conandata.yml (added the version)
recipes/qt/6.x.x/patches/c72097e_6.9.0.diff (the source file has changed)
recipes/qt/6.x.x/qtmodules6.9.0.conf (Qt modules)
recipes/qt/config.yml (added the version)

---

• Read the contributing guidelines
• Checked that this PR is not a duplicate: list of PRs by recipe
• Tested locally with at least one configuration using a recent version of Conan

Tested locally:
conan source . --version=6.9.0
conan install . --build=missing --version=6.9.0
conan build . --version=6.9.0
conan export-pkg . --version=6.9.0

[CLAassistant]

All committers have signed the CLA.

[gav2xlin]

#26490 6.8.2
#25959 6.8.0
They are abandoned

[DeepDiver1975]

#26490 6.8.2
#25959 6.8.0

Would still be great to have 6.8.x - Qt 6.8 is the LTS version .... just saying - THX

[gav2xlin]

@DeepDiver1975

#27465 Qt 6.8.3

[gav2xlin]

@DeepDiver1975
Qt 6.9.0 requires newer C++ compilers

(Windows)
CMake Error at qtbase/cmake/QtWindowsHelpers.cmake:10 (message):
Qt requires at least Visual Studio 2022 (MSVC 1930 or newer), you're
building against version 1929. You can turn off this version check by
setting QT_NO_MSVC_MIN_VERSION_CHECK to ON.

(macOS)
CMake Error at qtbase/cmake/QtPublicAppleHelpers.cmake:968 (message):
Qt requires at least version 14 of the platform SDK, you're building
against version 12.3. Please upgrade. You can turn this error into a
warning by configuring with -DQT_FORCE_WARN_APPLE_SDK_AND_XCODE_CHECK=ON,
but the build will likely fail. Use at your own risk.