Added github action to run e2e on each PR

.github/workflows/comment-on-e2e-success.yml

@@ -0,0 +1,23 @@
+name: Confirm E2E tests success
+on:
+  repository_dispatch:
+    types: [comment-pr-on-success]
+jobs:
+  comment:
+    name: Comment on PR#${{ github.event.client_payload.pr_number }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Create success comment
+        if: ${{ github.event.client_payload.status == success()}}
+        uses: peter-evans/create-or-update-comment@v1
+        with:
+          issue-number: ${{ github.event.client_payload.pr_number }}
+          body: |
+            E2E Tests Passed
+      - name: Create failure comment
+        if: ${{ github.event.client_payload.status == failure()}}
+        uses: peter-evans/create-or-update-comment@v1
+        with:
+          issue-number: ${{ github.event.client_payload.pr_number }}
+          body: |
+            E2E Tests Failed

.github/workflows/deploy-rinkeby.yml

@@ -162,3 +162,16 @@ jobs:
           token: ${{ secrets.E2E_RUN_HOOK_ACCESS_TOKEN }}
           repository: gnosis/safe-react-e2e-tests
           event-type: run-e2e-from-safe-react
+  e2ePR:
+    name: Trigger e2e tests on pr
+    if: github.event.number
+    needs: deploy
+    runs-on: ubuntu-latest
+    steps:
+      - name: Repository Dispatch
+        uses: peter-evans/repository-dispatch@v1
+        with:
+          token: ${{ secrets.E2E_RUN_HOOK_ACCESS_TOKEN }}
+          repository: gnosis/safe-react-e2e-tests
+          event-type: run-e2e-from-safe-react-on-pr
+          client-payload: '{"pr_number": "${{ github.event.number }}"}'