Vertex input buffers only support VK_FORMAT_A2B10G10R10_UNORM_PACK32.
This cl adds all the signed and integer variants of that format.

This cl also removes StreamType and replaces it with VkFormat.

Tests: dEQP-VK.*r10*
Bug: b/142661203
Change-Id: I996705395cbb493c599e1a460a6368a7e00d5a55
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/40348Tested-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>