Add a CL tool to process bilby_mcmc runs online

This adds

• bilby_pipe_process_mcmc an executable to process a live mcmc analysis
• bilby_pipe_htcondor_sync an executable to sync the resume files (and any figures) from the execute nodes to the submit node when running with file-transfer=True

Note, the htcondor_sync also works for dynesty runs. So, this should mean that most people should use file-transfer and be able to access results when requrired.