radv/rt: move Ray Tracing shader creation into separate file

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19525>

src/amd/vulkan/meson.build

@@ -85,6 +85,7 @@ libradv_files = files(
   'radv_radeon_winsys.h',
   'radv_rra.c',
   'radv_rt_common.c',
+  'radv_rt_shader.c',
   'radv_sdma_copy_image.c',
   'radv_shader.c',
   'radv_shader.h',

src/amd/vulkan/radv_shader.h

@@ -763,4 +763,8 @@ bool radv_force_primitive_shading_rate(nir_shader *nir, struct radv_device *devi
 bool radv_lower_fs_intrinsics(nir_shader *nir, const struct radv_pipeline_stage *fs_stage,
                               const struct radv_pipeline_key *key);
 
+nir_shader *create_rt_shader(struct radv_device *device,
+                             const VkRayTracingPipelineCreateInfoKHR *pCreateInfo,
+                             struct radv_pipeline_shader_stack_size *stack_sizes);
+
 #endif