opencl: improve get_rows, cpy, concat and q6_k flat gemv#24160

lhez merged 4 commits into

ggml-org:masterggml-org/llama.cpp:masterfrom

qualcomm:lh/get-rows-cpy-concat-q6_k-flat-gemvqualcomm/llama.cpp:lh/get-rows-cpy-concat-q6_k-flat-gemvCopy head branch name to clipboard