[Metax] refactor moe and flash attention backend

Author: neilzhuu

build.sh

@@ -159,8 +159,6 @@ function copy_ops(){
     is_maca=`$python -c "import paddle; print(paddle.device.is_compiled_with_custom_device('metax_gpu'))"`
     if [ "$is_maca" = "True" ]; then
       DEVICE_TYPE="metax_gpu"
-      mkdir -p ../fastdeploy/model_executor/ops/base
-      cp -r ${OPS_TMP_DIR_BASE}/${WHEEL_BASE_NAME}/* ../fastdeploy/model_executor/ops/base
       cp -r ${TMP_PACKAGE_DIR}/* ../fastdeploy/model_executor/ops/gpu
       echo -e "MACA ops have been copy to fastdeploy"
       return