tracing NS + category region component
- made library.cpp impl more broadly available
- support for perfetto args
- MPI wrappers encode args and return type
- new categories / perfetto categories
- omnitrace_library category -> libomnitrace
- omnitrace_dl_library -> libomnitrace-dl
- Got rid of `source/lib/omnitrace/include` and `source/lib/omnitrace/src` and merged into `source/lib/omnitrace`
- Updated perfetto submodule to v25.0
- Updated papi submodule