Bug 29690: Prevent detail.pl to crash if MARCXML is invalid

Bug 29690: Prevent detail.pl to crash if MARCXML is invalid

Bug 23846 added support for invalid MARCXML.
But now page details.pl fails again with software error.
This comes from several Koha::Biblio calling $self->metadata->record without eval.

Test plan :
1) Create a biblio record with invalid MARCXML (see Bug 29690)
In koha-testing-docker there is biblionumber=369
2) Go to page cgi-bin/koha/catalogue/detail.pl?biblionumber=xxx
3) You see the page with a message :
There is an error with this bibliographic record, the view may be degraded.
Error: Invalid data, cannot decode metadata object ...

Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>