Add missing infrastructure for simulation run on mdb-nsim.
When the nSIM via mdb simulation support was added to Zephyr
scripts the handler call was lost. So nSIM via mdb simulation
was broken from the beginning.
Fix that bu adding missing handler call fro mdb-nsim.
Note that we use BinaryHandler which call west flash. It's
required in case of nSIM via mdb as we create mdb.pid file with
mdb-nsim runner help.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
