[codesize] Use hours and UTC in GCS file names

codesize.skia.org was missing data and a misunderstanding of
file names was one cause.

To be consistent with Gold (and Perf?) we should use UTC as the
time zone for the folders and add hours. The server has been
switched to UTC in https://skia-review.googlesource.com/c/buildbot/+/548262/

This also fixes a race condition caused by upload the .tsv files
before the .json files. When the server sees a Pub/Sub event
for a .tsv file, it indexs the corresponding .json file.
Frequently, the .json file wouldn't have been uploaded yet,
so the indexing would fail.

Change-Id: Iabe64786db6e5c6020a3fc5dda244ccbe478c401
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/548357
Reviewed-by: Leandro Lovisolo <lovisolo@google.com>
2 files changed