Move some interp scanner tests into a dedicated dir

[FollowTheProcess]

Summary

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.3%. Comparing base (a720a2b) to head (1c1f179).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #153   +/-   ##
=====================================
  Coverage   79.3%   79.3%           
=====================================
  Files         27      27           
  Lines       1930    1930           
=====================================
  Hits        1532    1532           
  Misses       296     296           
  Partials     102     102           

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