[FIX] base: missing rng attribute 'force_save' on fields
[FIX] base: missing rng attribute 'force_save' on fields

Th view validation when attribute force_save is set on a field raise an
'Invalidation error' because there is no rng attribute for 'force_save'.

This attribute disappeared during the refactoring in rev: https://github.com/odoo/odoo/commit/70942e4cfb7a8993904b4d142e3b1749a40db806
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