Feat: Contract group change wizard
CHANGELOG:
### Feat
- [#1122](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1122) Created wizard to change or delete contract groups
Related card: https://trello.com/c/kUJubktF/1762-agrupaci%C3%B3n-de-contratos