[FIX] base: useless view validations when validate=False

When a view is created/modified, it is required to validate it, the
validation checks the syntax, the inheritances, the fields, etc. When a
view is rendered there are a few more steps to perform like to (dis)able
the `edit` button from a view form if the user only have `read`
accesses. Those postprocess are useless when the view is validated and
should only be performed when the view is rendered.

closes odoo/odoo#68469

Signed-off-by: Julien Castiaux <Julien00859@users.noreply.github.com>

odoo/addons/base/models/ir_ui_view.py

@@ -952,7 +952,9 @@ actual arch.
         if model not in self.env:
             self.handle_view_error(_('Model not found: %(model)s', model=model), node)
 
-        self._postprocess_on_change(model, node)
+        if not validate:
+            # validation mode does not care about on_change
+            self._postprocess_on_change(model, node)
 
         name_manager = NameManager(validate, self.env[model])
         self.postprocess(node, [], editable, name_manager)
@@ -960,7 +962,9 @@ actual arch.
         name_manager.check_view_fields(self)
         name_manager.update_view_fields()
 
-        self._postprocess_access_rights(model, node)
+        if not validate:
+            # validation mode does not care about access rights
+            self._postprocess_access_rights(model, node)
 
         return etree.tostring(node, encoding="unicode").replace('\t', ''), name_manager