Add SPV_NV_shader_atomic_fp16_vector extension (#3772)
It allowed fp16 atomics translation.
Spec:
https://github.com/KhronosGroup/SPIRV-Registry/blob/main/extensions/NV/SPV_NV_shader_atomic_fp16_vector.asciidoc
Original commit:
https://github.com/KhronosGroup/SPIRV-LLVM-Translator/commit/8e958fccde4ce5c