feat: Update subject information checks to CRITICAL importance for DANDI compliance

[bendichter]

fix #646

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.79%. Comparing base (09465e9) to head (2ce04d3).
⚠️ Report is 1 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #648      +/-   ##
==========================================
+ Coverage   77.17%   80.79%   +3.61%     
==========================================
  Files          47       47              
  Lines        1630     1630              
==========================================
+ Hits         1258     1317      +59     
+ Misses        372      313      -59     

Files with missing lines	Coverage Δ
src/nwbinspector/checks/_nwbfile_metadata.py	96.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

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