* ref_impl - Concat: buffer calculation of shape sizes * Update ngraph/core/reference/src/runtime/reference/concat.cpp Co-authored-by: Gleb Kazantaev <gleb.nnstu@gmail.com> Co-authored-by: Patryk Elszkowski <patryk.elszkowki@intel.com> Co-authored-by: Gleb Kazantaev <gleb.nnstu@gmail.com>