Fix Triton GEMM + PostOp (add matrix) kernel benchmark int8 failure BMG#5595

dev-tomek wants to merge 6 commits intomainintel/intel-xpu-backend-for-triton:mainfrom

tkuczynski/fix_benchmarks_bmgintel/intel-xpu-backend-for-triton:tkuczynski/fix_benchmarks_bmgCopy head branch name to clipboard