fix: stage buttons CRMLead form view
requested to merge fix/CRMLead-form-view-stage-buttons-delivery-generation into feature/correos-new-lead-stages
CHANGELOG:
### Fixed
- [#960](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/960) fix: stage buttons CRMLead form view