[FW][IMP] accounting/l10n_cl: electronic purchase invoice

[fw-bot]

…voice

Google Drive image folder: https://drive.google.com/drive/folders/12OaeDvzn-u5Nf_AjhIzrWaZWEb7smlTL?usp=drive_link

Forward-Port-Of: odoo/documentation#7893

[robodoo]

Pull request status dashboard.

[fw-bot]

This PR targets saas-16.3 and is part of the forward-port chain. Further PRs will be created up to master.

More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port