Vulkan: Faster check for vertex attribute aliasing In preparation for matrix attribute aliasing support, where CalculateAliasingAttributes would get a bit more complex. This change adds a fast-check function to determine if there is any aliasing at all. Bug: angleproject:4249 Change-Id: Ib2aa08b2da29a194baa905ba8f9aa2cdef0ae2c5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2488127 Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>