Needed to disable QT_NO_UNSHARABLE_CONTAINERS, as this
triggers asserts.
QMetaType also has some Qt 6 specific code disabled to
get things to compile.
Fix various details in autotests to accommodate for
the changes with Qt 6.
Add a workaround for black lists on macos, where
QSysInfo::productType() now returns 'macos' and not
'osx' anymore.
Change-Id: Ie26afb12a2aac36521472715934a7e34639ea4d0
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>