Add an Event hook for after Gateway response is returned

[mylesthedev]

There is already a hook EVENT_BEFORE_GATEWAY_REQUEST_SEND however there isn't one after the response is returned from the gateway.

The reason this would be helpful is some gateways return encoded responses and might need decoding (See PlatoCreative/commerce-payment-express#5 (comment))

I believe this should happen after this line $this->sendRequest($request);

[anchovy]

We've got the same need.

+1 for a EVENT_AFTER_GATEWAY_REQUEST_RECIVED - we need to capture a service fee added by the gateway provider (PlatoCreative/commerce-payment-express#3)

PHP: 8.0.8
Craft: Craft Pro 3.7.50
Commerce: 3.4.16
Payment Express for Craft Commerce 2: 1.5.0

[TheCohorts-reuben]

Same here, this would be great to have!