Add PROJECT to codereview.settings for CQ.
Add PROJECT to codereview.settings for CQ.

BUG=403494
R=akuegel@chromium.org, maruel@chromium.org

Review URL: https://codereview.chromium.org/1298723002 .

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py