Add support for OSACA

[vchuravy]

I recently added minimal support for llvm-mca, but it would be great to additionally have support for osaca

[Seelengrab]

OSACA also seems to support comment markers like LLVM-MCA, so those could be "just used" instead of the LLVM-MCA markers if OSACA output is requested. Maybe an API like

analyze(osaca(), foobar, args)
analyze(llvmmca(), foobar, args)

for selecting which analysis to run would be good? I'd like to add support for this after #31 is solved, since that issue will probably affect OSACA the same way - it's not analyzer specific after all.