FIX unable assign role_line with same role different companies

Related to this card.

I feel that perhaps it is a BUG or a inconsistence of the OCA module 'base_user_role_company' because this domain at xml-view level it is not allowing to add additional role line ids if the role_id is already assigned to the user, but we need to be able to assign the same Role to a user but for different companies.

The module 'base_user_role_company' already have a sql-constrain implemented at res.users.role.line model that it taking care of no user+role+company duplicities: _sql_constraints = [ ( "user_role_uniq", "unique (user_id,role_id,company_id)", "Roles can be assigned to a user only once at a time", ) ]

So I feel that we can proceed to teke out this xml-view domain. I you @enricostn & @DaniilDigtyar ara agre, we can also proceed to suggest it as a MR proposal to the OCA repo of 'res.users.role.line'

energy_communities/views/res_users_view.xml

@@ -13,5 +13,15 @@
             </field>
         </record>
 
+    <record id="view_res_users_form_inherit" model="ir.ui.view">
+        <field name="name">res.users.form.inherit</field>
+        <field name="model">res.users</field>
+        <field name="inherit_id" ref="base.view_users_form" />
+        <field name="arch" type="xml">
+            <xpath expr="//notebook//field[@name='role_line_ids']/tree//field[@name='role_id']" position="attributes">
+                <attribute name="domain"/>
+            </xpath>
+        </field>
+    </record>
     </data>
 </odoo>
\ No newline at end of file