Add e2e test trigger for fork PRs. It has to be explicitly approved

Author: Pijukatel

.github/workflows/on_pull_request_fork.yaml.yml

@@ -0,0 +1,20 @@
+on:
+  pull_request_target:
+      secrets:
+          APIFY_TEST_USER_API_TOKEN:
+              required: true
+
+jobs:
+  approve_e2e_tests_on_fork:
+    if: github.event.pull_request.head.repo.full_name != github.repository
+    environment: forks-PR
+    runs-on: ubuntu-latest
+    steps:
+      - name: Approve E2E tests
+        run: echo "Approved"
+
+  run_e2e_tests:
+    needs: approve_e2e_tests_on_fork
+    uses: ./.github/workflows/on_schedule_tests.yaml
+    secrets:
+      APIFY_TEST_USER_API_TOKEN: ${{ secrets.APIFY_TEST_USER_API_TOKEN }}

.github/workflows/on_schedule_tests.yaml

@@ -8,6 +8,9 @@ on:
   schedule:
     - cron: '0 6 * * *'
 
+  # Runs when invoked by another workflow.
+  workflow_call:
+
 concurrency:
   group: scheduled-tests
   cancel-in-progress: false