Puppeteer E2E test: Run on multiple OSes (#25383)

* Puppeteer: Run on multiple OSes

* Back to 8 threads

.github/workflows/ci.yml

@@ -54,11 +54,12 @@ jobs:
 
   e2e:
     name: "E2E testing"
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         CI: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
+        os: [ windows-latest, ubuntu-latest, macos-latest ]
     env:
       CI: ${{ matrix.CI }}
       FORCE_COLOR: 1