Add ability to pass GITHUB_APP_ID and GITHUB_APP_KEY to Docker contai…

…ner via `github-app-id` and `github-app-key` secrets

.github/workflows/feature-test-2gp.yml

@@ -26,6 +26,10 @@ on:
                 required: true
             github-token:
                 required: true
+            github-app-id:
+                required: false
+            github-app-key:
+                required: false
 
 jobs:
     feature-test:
@@ -43,6 +47,8 @@ jobs:
                 DEV_HUB_CLIENT_ID: "${{ secrets.dev-hub-client-id }}"
                 DEV_HUB_PRIVATE_KEY: "${{ secrets.dev-hub-private-key }}"
                 CUMULUSCI_SERVICE_github: '{ "username": "${{ github.actor }}", "token": "${{ secrets.github-token }}", "email": "${{ secrets.gh-email }}" }'
+                GITHUB_APP_ID: "${{ secrets.github-app-id }}"
+                GITHUB_APP_KEY: "${{ secrets.github-app-key }}"
         steps:
             - name: Checkout
               uses: actions/checkout@v2