feat: enable visualization of code list usage in library

[standeren]

Description

⚠️ Not implemented design in this PR, just an example of what data we have about the usage ⚠️

Related Issue(s)

This PR will allow us to deny deletion and code-list-id-editing if a code list is in use. However, it will not actually show where the code list is used, but the data to visualize it will be available in the library. Adding support to view where it is used will be another issue.

• Deletion of code lists in the content library #13950
• Editing code list ID's in the content library #13951

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

Documentation

• User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.54%. Comparing base (1545c2d) to head (52bb156).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14308   +/-   ##
=======================================
  Coverage   95.53%   95.54%           
=======================================
  Files        1860     1862    +2     
  Lines       24099    24125   +26     
  Branches     2782     2785    +3     
=======================================
+ Hits        23024    23050   +26     
  Misses        817      817           
  Partials      258      258           

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[ErlingHauan]

Nice work!