Break packs if the ba contract ends

CHANGELOG:

### Added
- [#924](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/924) Break packs if the ba contract ends

Related card: https://trello.com/c/eKfYKgBC/1432-proc%C3%A9s-finalitzaci%C3%B3-contracte-ba

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