test(structured-list): increase coverage

[ariellalgilmore]

Closes #17508
Closes #17509

Increase coverage for Structured list and Structured list skeleton

Changelog

New

• added structuredList skeleton

Changed

• updated StructuredList imports and added a test to check clicking on a selection row

Testing / Reviewing

Make sure tests are passing

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.98%. Comparing base (9d1822c) to head (d92fd0c).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17705      +/-   ##
==========================================
+ Coverage   78.33%   78.98%   +0.64%     
==========================================
  Files         408      408              
  Lines       14015    14015              
  Branches     4324     4376      +52     
==========================================
+ Hits        10979    11070      +91     
+ Misses       2868     2778      -90     
+ Partials      168      167       -1     

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[alisonjoseph]