Add low aspect ratio demo case to the tracker

[clmould]

Description

Closes #3554

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.63%. Comparing base (25480ae) to head (dcab275).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4020      +/-   ##
==========================================
- Coverage   45.89%   42.63%   -3.26%     
==========================================
  Files         123      123              
  Lines       29064    32414    +3350     
==========================================
+ Hits        13340    13821     +481     
- Misses      15724    18593    +2869     

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[timothy-nunn]

Duplicate of the other file?