[FIX] *: update documentation links Following the recent reorganisation of the...

[FIX] *: update documentation links Following the recent reorganisation of the documentation in 12.0+, the majority of the documents have been moved and their old links are no longer valid. Some redirection rules will soon be deployed, but those rules might be dropped in some years and we want the links to still work, which is why we still replace the links to the new ones.

FW-Port of odoo/odoo#70675 (13.0)

closes odoo/odoo#70728

X-original-commit: 85c24961
Related: odoo/enterprise#18283
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>