feat: allow to link a mobile contract to a fiber one by API with its code reference
CHANGELOG:
### Added
- [#951](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/951) Allow to link a mobile contract to a fiber one when OTRS already knows its reference (`parent_pack_contract_id`)
Related card: https://trello.com/c/igFj9nUU/1504-permetre-link-de-contractes-ja-existents
Edited by Gerard Funosas