kiwix-desktop is built under Windows only in native_mixed config and QT
is not required for anything else. Therefore it doesn't make sense to
run QT installation in Windows native_dyn and native_static CI/CD jobs.
That will reduce the risk of those jobs failing because of problems with
QT mirrors.
Copied settings.ini of aqtinstall==3.1.21 python package (the version of
aqtinstall used by the jurplel/install-qt-action@v4 action as of today)
as .github/configs/aqt.ini and made the QT installation step use that
config. The cloned config file is going to be modified in the next commit.
In commit 2321717, OS_NAME was introduced to build_definition
in order to support jammy + focal.
The Trigger_Docker job was not updated and was to expecting to run on OS_NAME=linux
for which there is now line anymore and thus no possibility to trigger