* cuda: reserve space for quantize kv-cache at startup * address review comments * remove forward decl Co-authored-by: Johannes Gäßler <johannesg@5d6.de> * remove assert in ggml-cuda.cu Co-authored-by: Johannes Gäßler <johannesg@5d6.de> --------- Co-authored-by: Johannes Gäßler <johannesg@5d6.de>