Bug 14098: Implement the copy_and_replace action for MTT

Bug 14098: Implement the copy_and_replace action for MTT

This patch implements the copy and replace action for the marc
modification templates.
Instead of copying a field/subfield, it will erase the destination
fields/subfields.

Test plan:
Find it yourself.
Compare the differences between the copy and the copy_and_replace
actions.
The easier way to test is to 1/ create a complete record, 2/create some
modification templates and 3/ use the batch record modification with the
"preview" function.

QA note: I kept the same tests as "copy" and, if no change were
expected, I noted them "(same as copy)", to be sure this new action won't
introduce regression on these tests.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>