UCT/UD: add lock when doing async callback
UCT/UD: add lock when doing async callback

abouteiller/ucx,shssf/ucx,abouteiller/ucx,sergsagal1/ucx_rocm,sergsagal1/ucx_rocm,abouteiller/ucx,shssf/ucx,sergsagal1/ucx_rocm,abouteiller/ucx,shssf/ucx