[FIX] web: Remove offset only for datetime field, not date

Since https://github.com/odoo/odoo/pull/87584



with `date` field, pressing enter will removes 1 day to the value.
To fix it we have to ignore the offset suppression used for `datetime`

opw-2818927

closes odoo/odoo#89257

Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>