Implement copying between a buffer and a texture 2D array on Vulkan
This patch implements the creation of a 2D array texture and data
copying between a buffer and a layer of a 2D array texture on
Vulkan back-ends.
TEST=dawn_end2end_tests
The dawn.h and dawncpp.h structure definitions references dawnFoo or
dawn::Foo respectively when it should reference dawn_native::FooBase* in
dawn_native. Autogenerate files to declare the dawn_native version of
the structs and change the ProcTable generation to use it instead.
This is important to make libdawn_native a shared library because
currently it was depending on dawncpp's definition of .Get().
Jiawei Shao
Corentin Wallez