split-cl: Use owners client to suggest owners.
split-cl: Use owners client to suggest owners.

Change-Id: I7aab38306e0699de465d0d2ab83dd37c4a099eee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2669149
Commit-Queue: Edward Lesmes <d05609f027dc667cc37492b1dc1bdea5d60fa82a@chromium.org>
Auto-Submit: Edward Lesmes <d05609f027dc667cc37492b1dc1bdea5d60fa82a@chromium.org>
Reviewed-by: Josip Sokcevic <4606aec58cba917397ff2e4738f995e4758694f8@google.com>

CoherentLabs/depot_tools,CoherentLabs/depot_tools