Improve SR creation form view

CHANGELOG:

### Changed
- [#421](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/421) Modify the SubscriptionRequest form:
  - Hide Company Type and Company Register Number.
  - Hide name and fill it with Company Name or firstname concat with lastname.
  - Fill the field state with the info of the partner selected as Cooperator.
  - Modify partner_id domain to don't show members and addresses/emails.

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