artifacts: add Get{Request/Response}

BundleArtifacts is broken in all current versions, so we're going to
rename it.

BUG=chromium:1034529
TEST=generate

Change-Id: Ifc224dba21d4c1a422eb6045619abb4c4d019f08
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2660275
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
2 files changed