Vulkan: Don't store vertex attrib format and stride. We only use these values in vertex conversion. We can instead pass more info to the convertGPU/CPU functions. In client attribute streaming we can query the format table a second time. This is a bit slower. But the runtime of attribute streaming would usually be dominated by the conversion function time. So it shouldn't regress any real work perf. This saves on a bit of storage and memory overhead in the vertex sync functions in VertexArrayVk. Bug: angleproject:3014 Change-Id: I401eeff024664aa0efeea710503c0f619e6d4f22 Reviewed-on: https://chromium-review.googlesource.com/c/1406889 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>