[commit-queue.cfg] Create new project-scoped CQ config.

Autogenerated from ref-scoped cq.cfg located at:
  https://gn.googlesource.com/gn/+/refs/heads/master/infra/config/cq.cfg
  (pinned https://gn.googlesource.com/gn/+/90dcf0c7c4d1365aa574faff5cc131ada7a95eb5/infra/config/cq.cfg)

The new config is functionally equivalent to the old one. Upon landing, the new
config will take effect once LUCI config service picks it up. If you see
'commit-queue.cfg' in https://luci-config.appspot.com/#/projects/gn ,
then it has been picked up.

New commit-queue.cfg takes precedence over old cq.cfg, and once picked up makes
it safe to remove old cq.cfg.

See also internal PSA go/psa-migrate-to-commit-queue-cfg.

Generated-by: https://crrev.com/i/815809
Bug: chromium:916292
Change-Id: Ib402dbf303583db57b6b6c48ede63ebd2616cded
Reviewed-on: https://gn-review.googlesource.com/c/3840
Reviewed-by: Petr Hosek <phosek@google.com>