libvirt: Update to version 8.9.0

libvirt: Update to version 8.9.0

- Update from 7.10.0 to 8.9.0
- Update of rootfile
- Removal of sheepdog_storage option in ./configure as it has been removed from libvirt
- Removal of libvirt-7.10.0-fix-glibc-headers.patch as contents are now built in to source
   tarball.
- Changelog is too large to include here. Details can be found in the NEWS.rst file in
   the source tarball.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>