chore: Fix conflict when uploading test results in CI (#4123)

When verify tests fail on multiple runners in CI, they all try to upload the test results using the same artifact ID, which leads to an error in CI (hiding the actual reason the job failed for any but the first failure encountered).

Author: jamescrosswell

.github/workflows/build.yml

@@ -130,7 +130,7 @@ jobs:
         if: failure()
         uses: actions/upload-artifact@v4
         with:
-          name: verify-test-results
+          name: ${{ runner.os }}-verify-test-results
           path: "**/*.received.*"
 
       # To save time and disk space, we only create and archive the Nuget packages when we're actually releasing.