This commit introduces the Alipay payment provider, a popular acquirer
in the Chinese market.
There are 2 possible ways to use this acquirer:
- express checkout mode (only available for merchants located in CN)
- standard checkout mode (availabe for foreign merchants)
Note that this provider does not support server-to-server payments,
tokenization or any other bells and whistles besides fees. There are no
specific behaviours related to this acquirer, it behaves like most 'form
based' payment acquirers with a form submission, s2s notification from
the provider as well as redirect in case the s2s did not reach the
server in time.
closesodoo/odoo#21855
Signed-off-by: Damien Bouvy (dbo) <dbo@odoo.com>