* ggml-cpu : compute f32 gelu_quick and geglu_quick without the fp16 table
* ggml-cpu : keep the GGML_GELU_QUICK_FP16 table path
* ggml-cpu : add the VXE gelu_quick path
* tests : add test-gelu-quick for the f32 CPU kernels
* tests : drop inf/nan inputs from test-gelu-quick