feat: FileInput component (internal)

[katiegeorge]

Reverts #2959

Also, this adds an additional hidden class to allow it to be picked up by the clickable elements integration test. The class removes the deprecated clip property and replaces it with a reusable hidden util.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.27%. Comparing base (02a8ba3) to head (23b5a3f).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2964      +/-   ##
==========================================
+ Coverage   96.25%   96.27%   +0.02%     
==========================================
  Files         769      770       +1     
  Lines       21736    21752      +16     
  Branches     7430     7380      -50     
==========================================
+ Hits        20921    20941      +20     
+ Misses        807      758      -49     
- Partials        8       53      +45     

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