One can now set QT_FORCE_FIND_TOOLS to ON together with passing a
QT_HOST_PATH to ensure that a new desktop build uses
already existing tools from a different Qt host (desktop) installation.
Depends on a0e56294c1
to work, which is not in 6.2, but this change is still included in
6.2 because it cleans up the conditions a bit to make them more clear.
Amends 42d3b21c92
and 5a779a4ad3
Pick-to: 6.2
Fixes: QTBUG-95099
Task-number: QTBUG-97658
Change-Id: If6258fb1091c6c1e457f22ae5f468b811bd20d57
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
c82bca9efe