[FIX] Make hsvs workflow work

[mattcieslak]

Addresses #718 and numerous neurostars issues. This fixes the hsvs workflow (specifically the FreeSurfer ingression) which got very broken when we moved to the nipreps config model.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 31.25000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 29.85%. Comparing base (6860e52) to head (6c9bbdf).

Files	Patch %	Lines
qsiprep/interfaces/bids.py	14.28%	4 Missing and 2 partials ⚠️
qsiprep/workflows/recon/anatomical.py	0.00%	3 Missing ⚠️
qsiprep/interfaces/freesurfer.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #784   +/-   ##
=======================================
  Coverage   29.84%   29.85%           
=======================================
  Files          97       97           
  Lines       14604    14613    +9     
  Branches     1885     1887    +2     
=======================================
+ Hits         4359     4362    +3     
- Misses      10117    10121    +4     
- Partials      128      130    +2     

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