Add copy attribute to account_id in AccountInvoice model
CHANGELOG:
### Added
- [#580](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/580) Add copy account_id of AccountInvoice in duplication.
Edited by Pelayo García
CHANGELOG:
### Added
- [#580](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/580) Add copy account_id of AccountInvoice in duplication.