Also deletes tons of fixed-function-centric stuff that will never be used by the Vulkan backend. Very little of the SPIRV integration actually does anything interesting yet (we don't generate code) but this wires on the new shader representation. Bug: b/120799499 Change-Id: Ib76e2086113098aebd526a0da461689d4344e8c2 Reviewed-on: https://swiftshader-review.googlesource.com/c/23090Tested-by: Chris Forbes <chrisforbes@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com> Reviewed-by: Alexis Hétu <sugoi@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
