test_platform: add new rejected_dimensions field

this one allows multiple values for the same key name, unlike its
predecessor

BUG=chromium:1179868,b:176102982
TEST=generate

Change-Id: Ia7654cfcdcd66978d53fe66e830a58064df0e8b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2704948
Commit-Queue: Dhanya Ganesh <dhanyaganesh@chromium.org>
Auto-Submit: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
2 files changed