thorium: pass actual message to profiler

Link: https://github.com/GeneAssembly/biosal/issues/752
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: rename the actor profiler

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: add source and message size in actor profiles

Link: https://github.com/GeneAssembly/biosal/issues/752
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>