chore: Reduced shard count to 5 for E2E (#12901)

.github/workflows/e2e.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        shard: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+        shard: [1, 2, 3, 4, 5]
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/dangerous-git-checkout