Bug 30744: Use RecordProcessor in get_marc_notes

Bug 30744: Use RecordProcessor in get_marc_notes

This patch utilises RecordProcessor to filter the MARC::Record for the
right interface prior to constructing the marc notes array.  We also
remove the use of C4::XSLT for replacing AV values in the MARC fields in
preference to using the RecordProcessor filter.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>