ggml-hexagon: mm for mtmd (llama/17894)
* feat: add run_mtmd script for hexagon
* fix: fix issue in fp16xfp32 mm
* fix: remove opt_experiment for fp16xfp32 mm
* fix: ggml-hexagon: matmul fp16xfp32 support non-contigious src0
* fix: fix syntax check for run-mtmd.sh for cli
