Revert "[ci.yaml] Move roller to blocking (#28134)"

CaseyHillers · web-flow · commit ca5f53d7734d · 2021-08-17T13:19:21.000-07:00
This reverts commit 8326455.
diff --git a/.ci.yaml b/.ci.yaml
@@ -330,5 +330,6 @@ targets:
     scheduler: luci
 
   - name: Linux ci_yaml engine roller
+    bringup: true
     recipe: infra/ci_yaml
     scheduler: luci
