ENH: Add expected steps for FreeSurfer 7 recon-all

[effigies]

They hid their new recon-all table: https://surfer.nmr.mgh.harvard.edu/fswiki/ReconAllTableStableV6.0#ReconAllTableStable7.1.1

[codecov]

Codecov Report

Merging #3389 (3045fc3) into master (9e127cf) will decrease coverage by 0.27%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #3389      +/-   ##
==========================================
- Coverage   65.13%   64.86%   -0.28%     
==========================================
  Files         307      307              
  Lines       40372    40368       -4     
  Branches     5336     5337       +1     
==========================================
- Hits        26297    26184     -113     
- Misses      13003    13089      +86     
- Partials     1072     1095      +23     

Flag	Coverage Δ
unittests	64.86% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
nipype/interfaces/freesurfer/preprocess.py	65.46% <0.00%> (-0.91%)	⬇️
nipype/interfaces/r.py	45.83% <0.00%> (-37.51%)	⬇️
nipype/interfaces/nipy/base.py	80.00% <0.00%> (-20.00%)	⬇️
nipype/testing/utils.py	70.90% <0.00%> (-18.19%)	⬇️
nipype/workflows/__init__.py	88.23% <0.00%> (-11.77%)	⬇️
nipype/interfaces/freesurfer/base.py	65.32% <0.00%> (-11.30%)	⬇️
nipype/info.py	78.12% <0.00%> (-9.38%)	⬇️
nipype/__init__.py	46.80% <0.00%> (-6.39%)	⬇️
nipype/pkg_info.py	75.00% <0.00%> (-6.25%)	⬇️
nipype/pipeline/plugins/linear.py	79.16% <0.00%> (-4.17%)	⬇️
... and 26 more

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[mgxd]

I skimmed through the table, and things LGTM.