thorium: add tracepoints for profiling events

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: use tracepoints for message delivery paths

Link: https://github.com/GeneAssembly/biosal/issues/751
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: add tracepoints actor:receive_enter and actor:receive_exit

The actor profiler code was using a particular syntax for
tracing message reception events. This patch changes this code
so that it uses the thorium tracepoints instead.

Link: https://github.com/GeneAssembly/biosal/issues/751
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>