[FIX] base: allow erp manager to set multi-company on a user

If a user member of group 'group_erp_manager' create a new user and adds
the user in multiple companies, the system raises an AccessError on ir.ui.view

When adding a user in multiple companies, he is automatically added in
the 'base.group_multi_company' group.
Modifying a 'res.group' record recomputes the view architecture.
The ir.ui.view records is writable by 'base.group_system' users.

Closes #21207

odoo/addons/base/res/res_users.py

@@ -775,6 +775,11 @@ class GroupsView(models.Model):
             xml = E.field(E.group(*(xml1), col="2"), E.group(*(xml2), col="4"), name="groups_id", position="replace")
             xml.addprevious(etree.Comment("GENERATED AUTOMATICALLY BY GROUPS"))
             xml_content = etree.tostring(xml, pretty_print=True, xml_declaration=True, encoding="utf-8")
+            if not view.check_access_rights('write',  raise_exception=False):
+                # erp manager has the rights to update groups/users but not
+                # to modify ir.ui.view
+                if self.env.user.has_group('base.group_erp_manager'):
+                    view = view.sudo()
             view.with_context(lang=None).write({'arch': xml_content, 'arch_fs': False})
 
     def get_application_groups(self, domain):