chore: set copilot e2e test shard to 10 (#13064)

#### PR Dependency Tree


* **PR #13064** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Increased the number of test shards for end-to-end tests from 8 to 10,
improving test parallelization and potentially reducing testing time.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/build-test.yml

@@ -972,8 +972,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        shardIndex: [1, 2, 3, 4, 5, 6, 7, 8]
+        shardIndex: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
-        shardTotal: [8]
+        shardTotal: [10]
     needs:
       - build-server-native
     services:

.github/workflows/copilot-test.yml

@@ -109,8 +109,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        shardIndex: [1, 2, 3, 4, 5, 6, 7, 8]
+        shardIndex: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
-        shardTotal: [8]
+        shardTotal: [10]
     needs:
       - build-server-native
     services: