Make delivery_address not required if icc

CHANGELOG:

### Changed
- [#661](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/661) Make delivery_address not required if icc

Related card: https://trello.com/c/tTrkJYXH/1030-delivery-address-no-obligatoria-en-creacion-de-crmlead-que-ya-tiene-la-sim-de-sc

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With the ICC we know that the user has a SIM card of Som Connexió, and we don't need to send it to him.