[CQ] Move fuchsia trybots to LUCI

NOTRY=true

Bug: chromium:772816
Change-Id: Iff1f2aeb79ead4782fe8fffc2c32b6f406c31539
Reviewed-on: https://chromium-review.googlesource.com/725380Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48678}

infra/config/cq.cfg

@@ -22,12 +22,15 @@ verifiers {
 
   try_job {
     buckets {
-      name: "master.tryserver.v8"
-      builders { name: "v8_android_arm_compile_rel" }
+      name: "luci.v8.try"
       builders {
         name: "v8_fuchsia_rel_ng"
         experiment_percentage: 20
       }
+    }
+    buckets {
+      name: "master.tryserver.v8"
+      builders { name: "v8_android_arm_compile_rel" }
       builders { name: "v8_node_linux64_rel" }
       builders { name: "v8_linux64_asan_rel_ng" }
       builders {