feat: hide authorizer for rental orders, auto-set sale type

Rental orders no longer show the "Authorizer Required?" question or
the Authorizer field. The sale type is automatically set to 'Rentals'
when creating or confirming a rental order. Validation logic also
skips authorizer checks for rental sale type.

Made-with: Cursor

fusion_poynt/__manifest__.py

@@ -9,6 +9,7 @@
     'description': " ",
     'depends': ['payment', 'account_payment', 'sale'],
     'data': [
+        'security/security.xml',
         'security/ir.model.access.csv',
 
         'report/poynt_receipt_report.xml',