infra: Add trybot_analyze_config. This file is used to specify ignores and excludes for analyze. Initially only contains DEPS. Whenever a file in exclusions is changed, we'll run the entire CQ instead of only the affected tests. Bug: angleproject:5114 Change-Id: Ie7328604f5ee56288f992710d5c3dbc559e6d9a3 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2867886 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>