Banking: extend generic HTTP node to support client certificate (QWAC Certificates)

hello,

recently i was trying to pull some data from my bank however they have a very strict set of requirements that i need to meet.

one of them is sending client certificate on every HTTP request (to double check you send valid requests)

please consider adding this extension.

sample ref from banks requirements:

QWAC Certificates

TPPs are required to present a QWAC certificate during API consumption. The API checks that this certificate has been provided and is valid.