Bug 35115: Move store routine from Resource to Title and update code

Bug 35115: Move store routine from Resource to Title and update code

These patches move the store routine from Koha::ERM::EHoldings::Resource to Koha::ERM::EHoldings::Title as the code deals exclusively with title fields.

It updates the code to ensure that records are created when a title is not attched to a biblio, and that only the biblio title field is updated when updating an eholdings title.

To test:
 1 - Enable ERMModule sys pref
 2 - Create a new public list, visit:
     /cgi-bin/koha/virtualshelves/shelves.pl
 3 - Click "New list" enter name, set public -> public
 4 - Click "Add items", enter 112\n113\n114 (new line for each), in "Biblio numbers"
 5 - Notice that all added biblios have quite a few MARC fields
 6 - Go to packages, visit:
     /cgi-bin/koha/erm/eholdings/local/packages
 7 - Create a new package, add a name and hit 'Submit'
 8 - Go to titles, visit:
     /cgi-bin/koha/erm/eholdings/local/titles
 9 - Click "import from list"
10 - Pick the package created in 7)
11 - On the row of the list created in 2), click "Import"
12 - Go back to the list, visit:
     /cgi-bin/koha/virtualshelves/shelves.pl?op=view&shelfnumber=1
13 - Notice all the biblios have been stripped of their MARC data, and only title remains.
14 - Go to details page for one of the bibs
15 - Edit -> Replace record via Z39.50
16 - You can search for anything, just make sure to import a mostly full record
17 - Go back to ERM - eHoldings - Local - Titles
18 - Edit the title for the record that was replaced
19 - Save
20 - Go to record details - note the record is gone again
21 - Apply patches
22 - Search the catalog
23 - Check some titles
24 - Add to a new list
25 - repeat 8 - 11 with the new list
26 - View and confirm records are intact
27 - Edit the eholdings title for one of the records, changing the title field
28 - Save and view record details
29 - Confirm record is intact and title updated

Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>