point_of_sale: This commit changes label `VAT` -> `Tax` because VAT is to be specific where other countries do use other taxes i.e. `GST` changing it to `Tax` makes it more generic l10n_in_pos: In India, it is mandatory to show the tax info This commit solves the issue where tax info was missing on POS ticket closes odoo/odoo#155699 Signed-off-by: Joseph Caburnay (jcb) <jcb@odoo.com>