Switch to target_sources approach for the static library resources

Linking the object resource library to the static library still
causes an issue if the static library contains symbols that are
used in the resource library. The proposed approach creates the
following linker chain:
    executable <- resource objects <- static library <- Qt::Core

For the static qml plugins this means that the qmlcache_loader
object file will state in the linker command line before the
plugin library that implements '::qmlData' and
'::aotBuiltFunctions' functions.

We also need to keep the INTERFACE linking of the resource library
to the targets that it belongs too, to collect all the dependencies
that resouce library supposed to propagate to top-level targets.

Pick-to: 6.1
Fixes: QTBUG-93002
Change-Id: Ice0aabb6817317724abeb3db3bb8a954905cfad1
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

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