anv: Land support for VK_KHR_ray_tracing

This is a meta-issue to track upstreaming of all the various bits required for ray-tracing on Intel hardware.

Compiling ray-tracing shaders:

• nir,spirv: Add support for SPV_KHR_ray_tracing (!6479 (merged))
• NIR: Add a new nir_jump_halt instruction (!5071 (merged))
• intel/compiler: Add support for ray-tracing shaders (!7356 (merged))
• vulkan,spirv: Updates for the final ray-tracing extensions (!7734 (merged))
• anv: Ray-tracing pipelines and dispatch (!8637 (merged))
• anv: Properly cache ray-tracing shaders in the pipeline cache (!8637 (merged))
• anv: Support deferred operations for ray-tracing pipeline compilation
• intel/fs: shader call lowering fix (!12113 (merged))

Various fixes:

• !15969 (merged)
• !15755 (merged)
• !16036 (merged)
• !16058 (merged)
• !16059 (merged)
• !16075 (merged)
• !16964 (merged)
• !17330 (merged)

Workarounds

• !16104 (merged)

GPU-side BVH building

This requires a bunch of OpenCL kernels and compiler support in NIR and our back-end for enough of kernel SPIR-V to compile them.

• nir,spirv: Add generic pointers support (!6332 (merged))
• Implement SPV_INTEL_subgroups (!7448 (merged))
• anv: Add support for shaderInt64 on Gen11+ (!7329 (merged))
• nir: Optimize some subgroup ops (!7366 (merged))
• Move libclc stuff to common code (!9156 (merged))
• intel/compiler: Add a little OpenCL kernel compliation binary (!13171 (merged))
  • nir_opt_memcpy optimizations (!13166 (merged))
  • NULL pointers in SPIRV (!10672 (merged))
  • nir/algebraic optimizations (!13167 (merged))
  • nir/lower_io validation issue (!13168 (merged))
  • lowering fix (!12113 (merged))
• anv: Add support for compiling and dispatching OpenCL-style kernels (!16970 (merged))
• Import BVH building kernels and related infrastructure (!16970 (merged))
• Implement vkCmdBuildAccelerationStructures[Indirect]KHR

Those last two are place-holders. I'm sure the actual MRs will have different names.

Implement the API side of VK_KHR_ray_tracing

• vulkan,anv: Add a trivial implementation of VK_KHR_deferred_host_operation (!7735 (merged))
• anv: Implement acceleration structure basics (!7736 (closed))