[FIX] l10n_cl: taxpayer type and sequences of document type

Description:
- Add readonly attribute to partner view for l10n_cl_sii_taxpayer_type field for children res.partner records.
- Fix the tax payer type label to prevent usage of "label for.."
- Optimize document type order to put most used on top of file and in selection of document types during invoicing process

closes odoo/odoo#40877

Signed-off-by: Josse Colpaert <jco@openerp.com>