DT-649 backport patches from GS-41.5 (core20)

Backports several patches from Gnome Software 41.5 into Snap-Store 41, which is based on GS 41.4.

backport Disable scroll by mouse wheel on the HdyCarousel

backport appstream: implement parsing media_baseurl

backport appstream: Make sure kind is set before read during refine

backport appstream: Search for source-file as component children first

backport gs-plugin-appstream: Fix some application types not being correctly queried

backport Cancel ongoing app details load when switching app