Changes the OrganisationTypeField class used by
OrganisationOrganisationTypeForm.organisation_type
OrganisationTypeField is also used by the forms in
/add-service:
- CreateServiceForm
- CreateNhsServiceForm
Because of that, this commit also includes changes
to the template for that route.
Note: this also moves where OrganisationTypeField
appears in app/main/forms.py so it can use
GovukRadiosField.
0cdbb850aa