CMake: Partially fix QUIETness of find_package(Qt6 COMPONENTS Foo)

When Qt5Config.cmake was ported to Qt6, the assignment of
_Qt6_FIND_PARTS_QUIET was accidentally left out.

Make sure that when find_package(Qt6 QUIET COMPONENTS Foo) is
called, the underlying component find_package(Qt6Foo) call gets
a QUIET option as well.

This will silence short-form warnings like

 -- Could NOT find Qt6Foo (missing: Qt6Foo_DIR)

It currently won't silence any warnings produced by the transitive
find_package calls in QtModuleDependencies.cmake. That will require a
separate change.

Remove usage of _Qt6_FIND_PARTS_REQUIRED which was always empty.
See details of QTBUG-95573 why it's currently not used.

Pick-to: 6.2
Task-number: QTBUG-95573
Change-Id: I3822c068eecbe84c306a1b04f4187278d35ec3d5
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

0 files changed, 0 insertions, 0 deletions