Description of problem:

git-clone task fails when using github-push ClusterTriggerBinding as it uses param `git-repo-url` with value  `$(body.repository.url)` which uses the api url. 

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Create a Triggertemplate and eventlistener and a Pipeline that is run when a git event is received.

2 Use the `github-push` ClusterTriggerBinding. It can be configured in the eventlistener definition:

apiVersion: triggers.tekton.dev/v1beta1
kind: EventListener
metadata:
  name: vote-app
spec:
  serviceAccountName: pipeline
  triggers:
  - bindings:
    - ref: github-push
    template:
      ref: vote-app 

Actual results:

git-clone task in the pipeline fails.

Expected results:

Reproducibility (Always/Intermittent/Only Once):

Acceptance criteria: 

Definition of Done:

Build Details:

Additional info (Such as Logs, Screenshots, etc):

 *