Skip e2e workflow on pull requests (#1900)

.github/workflows/e2e.yaml

@@ -1,10 +1,10 @@
 name: Dozer E2E Test
 
 on:
-  schedule:
-    - cron:  '0 0 * * *'
   workflow_dispatch:
   merge_group:
+  pull_request_target:
+    branches: [main]
 
 env:
   CARGO_TERM_COLOR: always
@@ -17,10 +17,13 @@ concurrency:
 jobs:
   # Run e2e test
   e2e:
+    # Skip on PR, because it takes too long. Skipping instead of not triggering
+    # will make branch protection happy, so we can add it to the merge queue and
+    # run the job there
+    if: ${{ github.event_name != 'pull_request_target' }}
     timeout-minutes: 60
     runs-on:
       labels: ubuntu-latest
-
     steps:
       - if: github.event_name == 'pull_request_target'
         uses: actions/checkout@v3