Move floor to Qt 6.2 (#1272)

Move floor to Qt 6.2 (#1272)

* move floor from Qt 5.15 to 6.2.

* fix some CI failures

* try harder to fix coverage build

* try to fix coverage again

* try agin

* move up msvc tools minimum for Qt6

* clean up clazy warnings with Qt6.

* drop redundnant CI job

* revert translation related unintentionl changes

* simplify find qt packages

* assume Qt6 in textstream

* move CI tidy to noble

* assume Qt6 in textstream.h

* remove obsolete makesetup.bat

* remove Qt5 support from coretool

* strip Qt5 from noble image

* update default qt versions.

* update minimum cmake version to match Qt 6.2.4 QT_SUPPORTED_MIN_CMAKE_VERSION_FOR_USING_QT

* assume QHash result is type size_t

* remove unnecessary qOverloads (in Qt6).