radv/rt: Handle load_constant instructions when inlining shaders

radv/rt: Handle load_constant instructions when inlining shaders

Fixes the following tests:
dEQP-VK.ray_query.builtin.rayqueryterminate.ahit.aabbs,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.ahit.triangles,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.call.aabbs,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.call.triangles,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.chit.aabbs,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.chit.triangles,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.miss.aabbs,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.miss.triangles,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.rgen.aabbs,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.rgen.triangles,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.sect.aabbs,Fail
dEQP-VK.ray_query.builtin.rayqueryterminate.sect.triangles,Fail

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/8647
Fixes: fda262f ("radv/rt: move Ray Tracing shader creation into separate file")
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22002>