Add the new buildbotless infra-tests bot to the CQ as an experiment

infra/branch-config/cq.cfg

Index: infra/branch-config/cq.cfg
diff --git a/infra/branch-config/cq.cfg b/infra/branch-config/cq.cfg
index 9eaffa6cf487d79d787990510b66de96d1aee8af..f930a31f36355036cfccbab3fcd837fe43e08d5b 100644
--- a/infra/branch-config/cq.cfg
+++ b/infra/branch-config/cq.cfg
@@ -58,6 +58,13 @@ verifiers {
       # At time of writing, this is the fastest Chrome compile bot on average.
       builders { name: "mac_chromium_compile_dbg_ng" }
     }
+    buckets {
+      name: "skia.primary"
+      builders {
+        name: "Housekeeper-PerCommit-InfraTests"
+        experiment_percentage: 100
+      }
+    }
     try_job_retry_config {
       try_job_retry_quota: 1
       global_retry_quota: 2