panvk: Advertise various trivial extensions for Vulkan 1.3
This implements:
VK_KHR_shader_non_semantic_info
VK_KHR_shader_relaxed_extended_instruction
VK_EXT_tooling_info
VK_KHR_zero_initialize_workgroup_memory
Also fix a possible rematerialization of split alu operations after nir_lower_pack
causing issues.
Edited by Erik Faye-Lund