CI: Restore MSYS2/MinGW-w64 and move it to Qt6

[MehdiChinoune]

Description

Re-enable MSYS2/MinGW-w64 job but with Qt6.

[nyalldawson]

I'm -1 to introducing another ci build, UNLESS we can drop one of the existing ones or it's extremely high priority. There's just so many long running jobs here already. 🫤

[MehdiChinoune]

I'm -1 to introducing another ci build, UNLESS we can drop one of the existing ones or it's extremely high priority. There's just so many long running jobs here already. 🫤

I dropped MINGW64 (Fedora) job.

[nyalldawson]

@MehdiChinoune but why is this job more useful then the mingw one? As far as I see it:

• the mingw one provides a nicely packaged build ready for users to test
• the mingw build uses qt5, which is still the official supported qt version for qgis
• this msys build is now qt6 and duplicates the other qt 6 one, but that one also provides the useful SDK

So of the 3 windows builds, the msys2 one seems least useful to me...

[nicogodet]

Qt5 builds is still relevant as migration to Qt6 is not completely done yet (I reported a crash on qt6 which doesn't happen in qt5).
Previous job built an artifact to easily test a PR.
-1

[MehdiChinoune]

@MehdiChinoune but why is this job more useful then the mingw one? As far as I see it:

• the mingw one provides a nicely packaged build ready for users to test
• the mingw build uses qt5, which is still the official supported qt version for qgis

So, let's keep it

• this msys build is now qt6 and duplicates the other qt 6 one, but that one also provides the useful SDK

So of the 3 windows builds, the msys2 one seems least useful to me...

So you don't want to test MinGW-w64 + Qt6?

You know that MinGW is different than MSVC!

[github-actions]

🪟 Windows builds

Download Windows builds of this PR for testing.
Debug symbols for this build are available here.
(Built from commit d546e1f)

🪟 Windows Qt6 builds

Download Windows Qt6 builds of this PR for testing.
(Built from commit d546e1f)