[CQ] Raise experiment percentage for node-integration bot to 100

Bug: v8:6154
NOTRY=true
TBR=yangguo@chromium.org

Change-Id: I50529f820107dae701476deee285fa62a59374d1
Reviewed-on: https://chromium-review.googlesource.com/469706Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44426}

infra/config/cq.cfg

@@ -34,7 +34,7 @@ verifiers {
       builders { name: "v8_android_arm_compile_rel" }
       builders {
         name: "v8_node_linux64_rel"
-        experiment_percentage: 20
+        experiment_percentage: 100
       }
       builders { name: "v8_linux64_asan_rel_ng" }
       builders {