Get e2e tests working

Author: stevebux

.github/actions/acceptance-tests/action.yml

@@ -102,6 +102,7 @@ runs:
         TARGET_ENVIRONMENT: ${{ inputs.targetEnvironment }}
         PR_NUMBER: ${{ steps.set_pr_number.outputs.pr_number }}
       run: |
+        PR_NUMBER=""
         echo "$SUPPLIER_API_PRIVATE_KEY" > "${GITHUB_WORKSPACE}/internal-dev-test-1.pem"
         chmod 600 "${GITHUB_WORKSPACE}/internal-dev-test-1.pem"
         BASE_PROXY_NAME=nhs-notify-supplier--internal-dev--nhs-notify-supplier