Clean up `mcar-luigi.cfg` configuration for `MCAR` curation workflow

[FrancescoCasalegno]

• [ ] As noted in https://github.com/BlueBrain/morphoclass/issues/4#issuecomment-1154943646, the skip=True is ignored. So we should remove it from mcar-luigi.cfg configuration to avoid confusion.
• [ ] The two stages EnsureNeuritesOutsideSoma and ErrorsReport are run by the moprhology workflow for MCAR curation. So we should also mention them in the mcar-luigi.cfg file even if we are not using them.

[FrancescoCasalegno]

Which stages are executed by MCAR curation?

• Our MCAR curation stage in the dvc.yaml calls moprhology-workflows on the luigi stage Curate: https://github.com/BlueBrain/morphoclass/blob/65a4909b0ee3250756a50b3f58e4e1356aa38438/dvc/dvc.yaml#L58-L62
• The stage Curate depends on 14 different output luigi stages: https://github.com/BlueBrain/morphology-workflows/blob/bdd6cab92fcc35f01fb76c01d006619e47ceffcd/src/morphology_workflows/tasks/workflows.py#L72-L96
• These 14 stages do not have any further stage dependencies (except for some cross-dependencies among those 14 stages).
• So, in total, the follow 15 luigi stages are run:

1. Align
2. CheckNeurites
3. Collect
4. Curate -- the main stage we want to execute
5. DetectErrors
6. EnsureNeuritesOutsideSoma
7. ErrorsReport
8. ExtractMarkers
9. Orient
10. PlotErrors
11. PlotMarkers
12. PlotMorphologies
13. Recenter
14. Resample
15. Sanitize