nir/linker: Add nir_build_program_resource_list()

nir/linker: Add nir_build_program_resource_list()

This function is equivalent to the linker.cpp
build_program_resource_list() but will extract the resources from NIR
shaders instead.

For now, only uniforms and program inputs are implemented.

v2: move from compiler/nir to compiler/glsl (Timothy Arceri)

v3: remove support for inputs, that is still WIP (spotted by Timothy
    Arceri)

Signed-off-by: Eduardo Lima <elima@igalia.com>
Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>