This commit adds the possibility to define a maximum payment amount that
a given acquirer can process. If the payment amount exceeds the value,
the acquirer is filtered out of the available acquirers listed on the
payment forms.
While we're at it, the field `country_ids` is renamed to
`available_country_ids` to better depict that it is not a property of
the acquirer, but a configuration option. It will also be coherent with
the field `available_currency_ids` that is expected to be added soon.
Task - 2162165
closesodoo/odoo#82411
Related: odoo/enterprise#24412
Related: odoo/upgrade#3703
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>