FIX: Update surfaces with fsnative2t1w_xfm

[effigies]

We weren't applying the fsnative2t1w_xfm to the surfaces when converting. Also updated the transform to nitransforms directly, and invert the fsnative2t1w mapping, since that mapping maps points in T1w space to fsnative and we need to go the other way.

Confirmed that surfaces now align. This is needed to get CIFTI resampling working correctly, as that depends on GIFTIs.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (05ae8c5) 58.65% compared to head (477063c) 58.65%.

Additional details and impacted files

@@           Coverage Diff           @@
##             next     #384   +/-   ##
=======================================
  Coverage   58.65%   58.65%           
=======================================
  Files          26       26           
  Lines        1872     1872           
  Branches      238      238           
=======================================
  Hits         1098     1098           
  Misses        717      717           
  Partials       57       57           

Flag	Coverage Δ
ds005	∅ <ø> (∅)
ds054	46.79% <0.00%> (ø)
pytest	36.85% <50.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
smriprep/workflows/surfaces.py	22.52% <ø> (ø)
smriprep/interfaces/surf.py	72.03% <50.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.