Consider moving svd parsing function from inspiral.py
inspiral_pipe.py requires inspiral.py just for a svd string parsing function:
https://git.ligo.org/lscsoft/gstlal/-/blob/master/gstlal-inspiral/python/inspiral_pipe.py#L1624
we should move this function somewhere else since inspiral.py is a heavily burdened import (including gracedb client). More generally, we should consider where dag generating code lives and what it should depend on. That is why I am assigning this to @patrick.godwin