[FIX] Add bug fixes that never got committed to main

[DESm1th]

This PR contains a variety of bug fixes that fell through the cracks as a result of my head injury at the end of 2023 (ugh).

• [9279812] Pass the correct log level to dcm2bids
• [4cde97a] XNAT series numbers sometimes end up with a string appended when a merge goes wrong and series numbers get duplicated (this is an error that must be addressed within XNAT when it occurs). This fix stops these malformed series numbers from crashing the entire run of dm_xnat_extract.py
• [3fa8c3e] This fix stops a single exporter from crashing an entire run of dm_xnat_extract when an exception is raised.
• [5634635, 7341296, c21ecee] Contain a bunch of exporter bug fixes for when dcm2bids is used as the primary export method. This code should be refactored later, but is safe to merge. It has been running in production for the last year (despite not being committed to github, sorry!)