configure credentials before getting latest metrics

Author: 0marperez

.github/workflows/pull-request-metrics.yml

@@ -24,6 +24,12 @@ jobs:
           upload: 'false'
           release_metrics: 'false'
 
+      - name: Configure credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          role-to-assume: ${{ secrets.CI_AWS_ROLE_ARN }}
+          aws-region: us-west-2
+
       - name: Process metrics
         uses: awslabs/aws-kotlin-repo-tools/.github/actions/artifact-size-metrics/download-and-process@asm-v2 # TODO: Change to main before merging
         with: