Vulkan: add SCALED vertex formats to table. Add SCALED formats, which correspond to non-normalized integers, to Vulkan format table. Adjust test expectations accordingly. For now these new formats only work when the native Vulkan supports them. BUG=angleproject:2405 Change-Id: Ia6fdcbec61774536e6396cf713e46f28f49585c1 Reviewed-on: https://chromium-review.googlesource.com/1110710 Commit-Queue: Frank Henigman <fjhenigman@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>