[ENH] improve group level analysis

[Remi-Gau]

• fix bug on getting contrasts from previous levels upon loading model - fixes [BUG] getting too many contrasts when certain levels when loading a BIDS stats model #616
• make no smoothing of contrasts the default (too hard to handle with bids stats model for now)
• speed up bids results by not indexing BIDS datasets as this is not necessary
• allow using cpp_spm API to run group level analysis
• bidsResults can now run only run a subset of opt.results by using an extra parameter "nodeName"
• implements within group contrasts - closes [ENH] allow to generate within group contrast #600
• improves performance when collecting subject level contrasts to create batches for group level one-sample t-tests
• changes group level folder name pattern:

'sub-ALL-task-' model.Input.task '_space-' model.Input.space '_FWHM-' num2str(opt.fwhm.func) '_conFWHM-' opt.fwhm.contrast '_node-' model.Input.Nodes(dataset_level).Name '_contrast-' model.Input.Nodes(dataset_level).Contrast(i).Name

[codecov]

Codecov Report

Merging #620 (c558d72) into dev (26e1b9c) will increase coverage by 0.02%.
The diff coverage is 81.41%.

@@            Coverage Diff             @@
##              dev     #620      +/-   ##
==========================================
+ Coverage   75.51%   75.54%   +0.02%     
==========================================
  Files         208      209       +1     
  Lines        5151     5288     +137     
==========================================
+ Hits         3890     3995     +105     
- Misses       1261     1293      +32     

Flag	Coverage Δ
unittests	75.54% <81.41%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
src/WIP/makeStandalone.m	0.00% <ø> (ø)
src/bids_model/getContrastsList.m	95.23% <ø> (ø)
src/bids_model/getInclusiveMask.m	68.42% <ø> (ø)
src/group_level/findSubjectConImage.m	92.85% <ø> (-7.15%)	⬇️
src/workflows/setUpWorkflow.m	93.33% <ø> (ø)
src/workflows/stats/bidsResults.m	46.11% <44.82%> (+2.50%)	⬆️
src/bids_model/getDummyContrastsList.m	90.90% <50.00%> (-9.10%)	⬇️
...rc/bids_model/getContrastsListForFactorialDesign.m	76.92% <76.92%> (ø)
src/batches/stats/setBatchEstimateModel.m	89.28% <77.77%> (-5.96%)	⬇️
src/workflows/stats/bidsRFX.m	89.28% <90.00%> (-0.92%)	⬇️
... and 13 more

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