Currently, when using the website, you can input your information either during
the first checkout (website_sale) or in the profile (portal). The problem was
that the translation of the VAT was confusing for the user, as they may not
understand what "VAT" is.
We also added a field in the two forms, so it needed translation too.
This commit will change the translation in l10n_br_website_sale, website_sale
and portal to make it more clear for the user, helping them know what to input.
closesodoo/odoo#142165
Task: 3576516
Signed-off-by: Florian Gilbert (flg) <flg@odoo.com>