Vulkan: Split barriers into multiple calls to ensure no extra dependency gets introduced This tracks barriers in an array based on dstPipelineStage. Bug: b/155341891 Change-Id: Icba2ef81530edcdb9ae363b00f0e7b9efe93d48f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2188955 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Charlie Lao <cclao@google.com>