sync_restricted_traces_to_cipd checks for extra files Do not allow files outside of the expected ones (TraceFiles in json) * Ran this check on existing traces: we have a few extra cpp files in goddess_of_victory_nikke, lilys_garden Ask for confirmation before uploading (--upload to bypass) Other cleanup (threading instead of multiprocessing, much less noisy logging etc) Upload is no longer done in parallel. This might mean slower upload of large batches (batch upgrade in experimental?) but would make failures easier to understand. Bug: angleproject:8137 Change-Id: I71530b886541e8b1afe9d436bf300006afb06bd7 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4538368 Reviewed-by: Cody Northrop <cnorthrop@google.com> Commit-Queue: Roman Lavrov <romanl@google.com> Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>