fix(ci): change SAR assume role options (#3005)

Author: rubenfonseca

.github/workflows/reusable_deploy_v2_sar.yml

@@ -104,9 +104,7 @@ jobs:
         uses: aws-actions/configure-aws-credentials@ef93a73b1313f148011965ef7361f667f371f58b # v3.0.0
         id: aws-credentials-sar-role
         with:
-          aws-access-key-id: ${{ env.AWS_ACCESS_KEY_ID }}
-          aws-secret-access-key: ${{ env.AWS_SECRET_ACCESS_KEY }}
-          aws-session-token: ${{ env.AWS_SESSION_TOKEN }}
+          role-chaining: true
           role-duration-seconds: 1200
           aws-region: ${{ env.AWS_REGION }}
           role-to-assume: ${{ secrets.AWS_SAR_V2_ROLE_ARN }}