Function llama_sampler_init_xtc

pub unsafe extern "C" fn llama_sampler_init_xtc(
    p: f32,
    t: f32,
    min_keep: usize,
    seed: u32,
) -> *mut llama_sampler

@details XTC sampler as described in https://github.com/oobabooga/text-generation-webui/pull/6335