Import of contacts deletes email addresses

[Almut]

I used an email address to identify contacts in an import, because it is more unique than the first and last name. But when a contact has more than one email address, all non-matching addresses are deleted on update. The email address was ONLY used for identification and should not be changed.

EspoCRM version 9.3.5

Steps for reproducing:
* Choose a contact with at least two email addresses
* Create an import file that contains one of the email addresses and content for any other field, e.g. description
* Import by using email address for identification
* Check email addresses of the contact

[yuri]

Fix: https://github.com/espocrm/espocrm/c...e56d2efa370c9b