Move the luci-cfg config directory out of the infra/ python package.

infra/config/cq.cfg

-# See http://luci-config.appspot.com/schemas/projects/refs:cq.cfg for the
-# documentation of this file format.
-
-version: 1
-cq_name: "infra"
-cq_status_url: "https://chromium-cq-status.appspot.com"
-
-rietveld {
-  url: "https://codereview.chromium.org"
-}
-
-verifiers {
-  reviewer_lgtm {
-     committer_list: "chromium"
-  }
-  tree_status {
-    tree_status_url: "https://infra-status.appspot.com"
-  }
-  try_job {
-    buckets {
-      name: "tryserver.chromium.linux"
-      builders {
-        name: "infra_tester"
-      }
-    }
-  }
-}