Add previous service crm lead creation wizard

CHANGELOG:

### Added
- [#888](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/888) Add previous service crm lead creation wizard

Related card: https://trello.com/c/EOUAotHV/1399-afegir-servei-previ-a-creaci%C3%B3-crmlead-manual

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