Bug 30779: Do not update import marc after importing items

Bug 30779: Do not update import marc after importing items

We are stripping the marc item tags at import - we save them when not importing items, but
strip when importing items

I think we can save on writes by leaving them in the record. This also allows comparison to what was staged
versus items created

To test:
 1 - Stage a marc record with items, but do not look for items
 2 - Confirm the item tags remain in staged marc
 3 - Import the record
 4 - Confirm items are nto in imported marc record
 5 - Stage the record again, but look for items
 6 - Confirm the item tags are stipped from imported record
 7 - Import and confirm imported record has no item tags
 8 - Apply patch and repeat 1-5
 9 - Confirm item tags remain in record
10 - Import and confirm item tags not in imported marc

Signed-off-by: Andrew <andrewfh@dubcolib.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>