Wrap dependencies add a ton of warnings with the latest GCC in Fedora
42. Squelch them by specifying that these dependencies are not
a part of the gstreamer project, and should be treated as system deps.
libsoup needs some porting work for the bump, and vorbis/lame are
already at their latest releases.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8753>