Bug 31224: Update instances of metadata->record

Bug 31224: Update instances of metadata->record

We can now call metadata_record directly on the Koha::Biblio object.

This aptch updates all modules and controllers to use
Koha::Biblio->metadata_record directly where appropriate.  The
exceptions are where we don't require any filtering or the filtering
makes sense to do after the initial fetch.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>