test Depot runners for team commits (#6394)

Co-authored-by: ConnorYoh <[email protected]>

.github/workflows/nightly.yml

@@ -13,9 +13,13 @@ permissions:
   contents: read
 
 jobs:
+  pick:
+    uses: ./.github/workflows/_runner-pick.yml
+
   playwright-all-browsers:
     name: Playwright (chromium + firefox + webkit)
-    runs-on: ubuntu-latest
+    needs: pick
+    runs-on: ${{ needs.pick.outputs.is_fork == 'true' && 'ubuntu-latest' || 'depot-ubuntu-24.04-4' }}
     steps:
       - name: Harden the runner (Audit all outbound calls)
         uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1