[FIX] payment_stripe_sca: do not redefine `_get_stripe_api_url`
[FIX] payment_stripe_sca: do not redefine `_get_stripe_api_url`

There is no need to redefine `_get_stripe_api_url` by adding `https`
since all existing calls to the method programmatically add it already.

Therefore, we use the same approach: we add `https://`, then join the
URL.

opw-2031745

closes odoo/odoo#36957

X-original-commit: 0412786486462423c91afc1c5a4dcb25886827e4
Signed-off-by: Nicolas Martinelli (nim) <771435c469f83f6aa9c405ac5e1ed06314a94f2d@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo