ci(server): increase test parallelism (#11583)

.github/workflows/build-test.yml

@@ -752,8 +752,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        shardIndex: [1, 2, 3]
-        shardTotal: [3]
+        shardIndex: [1, 2, 3, 4, 5, 6, 7, 8]
+        shardTotal: [8]
     needs:
       - build-server-native
     services:

.github/workflows/copilot-test.yml

@@ -108,8 +108,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        shardIndex: [1, 2, 3]
-        shardTotal: [3]
+        shardIndex: [1, 2, 3, 4, 5, 6, 7, 8]
+        shardTotal: [8]
     needs:
       - build-server-native
     services: