Fix bids-validator installation and usage

[tsalo]

Closes #74.

Changes proposed in this pull request

• Install bids-validator v1.14.10 instead of newer version.
• Only validate dataset if running in raw+derivative mode.
• Print out the collected runs.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 30.62%. Comparing base (2f1aade) to head (35b35ae).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/fmripost_aroma/cli/parser.py	0.00%	2 Missing ⚠️
src/fmripost_aroma/workflows/base.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #76      +/-   ##
==========================================
- Coverage   30.64%   30.62%   -0.03%     
==========================================
  Files          26       26              
  Lines        2359     2361       +2     
  Branches      374      374              
==========================================
  Hits          723      723              
- Misses       1613     1615       +2     
  Partials       23       23              

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