latency_probe: add target actors

Link: https://github.com/GeneAssembly/biosal/issues/797
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
latency_probe: add source actor script

Link: https://github.com/GeneAssembly/biosal/issues/797
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
latency_probe: use source actor script

Link: https://github.com/GeneAssembly/biosal/issues/797
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>