When the owl refactoring landed, we rewrote the pyjs evaluation system.
Then, we used the new system in the new code. In particular, the action
service uses it to evaluate the action domain.
But the previous code had a subtle behaviour in the special case of
evaluating domain: it added the context as a pydict object in itself, so
one could evaluate expression such as `context.get('a', 14)` to read the
value of a key in the context with a fallback.
With this commit, we uniformize this behaviour across all python
expression: the `context` key is now reserved, and used to access
anything in the current evaluation context.
closesodoo/odoo#73227
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>