[Mesa-dev] i965: Use nir_shader_gather_info() over do_set_program_inouts()

[Timothy Arceri]

This takes us one step closer to being able to drop the GLSL IR
optimisation passes during linking in favour of the NIR passes.

Patch 4 has *not* been tested on Vulkan I've asked Mark to setup a branch
for me to run the Vulkan CTS with but don't have it yet.

Patch 6 needs to be squashed with 5 before pushing.