* rebuild changes from #9016
* serialize data to new DB field
** use VuFind's new getExtraMetadata
* change method for serialization
** relies on RecordDriver function instead of Solr fields
** adds some additional data
** add some functions to serialization
* adds result-list template to provide print output
* change search link for missing records
* use advanced search
* show standard title line for missing records
* assure bacwards compatiblity
** handle resource table entries that have been added before this feature went active
** early return if extra_metadata is missing
* some code styling