Test report upload minor fixes (#1118)

b/290997541

.github/workflows/unit_test_report.yaml

@@ -14,11 +14,11 @@ jobs:
     permissions: {}
       # TODO(b/293508740): Report failed workflow runs back to triggering PR.
       # pull-requests: write
-    if: always()
+    if: ${{ github.event.workflow_run.conclusion == 'success' || github.event.workflow_run.conclusion == 'failure' }}
     runs-on: ubuntu-latest
     name: Upload Unit Test Reports
     steps:
-      - name: Download Unit Test Results
+      - name: Download '${{ github.event.workflow_run.name }}' Unit Test Results
         # The `download-artifact` action can only access artifacts that were uploaded in the same workflow.
         # Since it was not this workflow that uploaded the artifacts we must use rest api to download them.
         # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#using-data-from-the-triggering-workflow
@@ -27,7 +27,11 @@ jobs:
           script: |
             const name = context.payload.workflow_run.name;
             const url = context.payload.workflow_run.html_url;
-            console.log(`Downloading unit test results for '${name}' (${url}).`);
+
+            console.log(`Downloading artifacts from ${url}`)
+            context.payload.workflow_run.pull_requests.forEach(pr => {
+              console.log(`Pull request: ${context.payload.repository.html_url}/pull/${pr.number}`);
+            });
 
             let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,