[FIX] core: fix _cleanup_from_default

Technically removing the entire thing if it's not one of the special
cases is a form of cleanup I guess, but that seems a bit brutal and
counter-productive. So that function should *probably* return the
input value if it's not a type which requires special processing.

closes odoo/odoo#51531

X-original-commit: b42994c87dce12c5ba22943f6cbe00240fe43138
Signed-off-by: Xavier Morel (xmo) <xmo@odoo.com>

odoo/tests/common.py

@@ -2389,6 +2389,7 @@ def _cleanup_from_default(type_, value):
         return odoo.fields.Datetime.to_string(value)
     elif type_ == 'date' and isinstance(value, date):
         return odoo.fields.Date.to_string(value)
+    return value
 
 def _get_node(view, f, *arg):
     """ Find etree node for the field ``f`` in the view's arch