repo_manifest: move to utils

This is a standalone module with no libs deps, so move it to utils.

BUG=None
TEST=CQ passes

Change-Id: I1f1b0d21f27220599a477b27362c793b47342ce4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3556429
Reviewed-by: Lizzy Presland <zland@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/find_project_path.py b/scripts/find_project_path.py
index 401448d..6d90ea6 100644
--- a/scripts/find_project_path.py
+++ b/scripts/find_project_path.py
@@ -10,8 +10,8 @@
 """
 
 from chromite.lib import commandline
-from chromite.lib import repo_manifest
 from chromite.lib import repo_util
+from chromite.utils import repo_manifest
 
 
 def get_parser():