feat: Allow omitting icon for file list actions

[Pytal]

Requested in nextcloud/server#49171

[codecov]

Bundle Report

Changes will increase total bundle size by 8 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
@nextcloud/files-esm	122.85kB	4 bytes (0.0%) ⬆️
@nextcloud/files-cjs	124.53kB	4 bytes (0.0%) ⬆️

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.62%. Comparing base (af6640e) to head (a2c5284).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1143   +/-   ##
=======================================
  Coverage   91.62%   91.62%           
=======================================
  Files          23       23           
  Lines         633      633           
  Branches      166      166           
=======================================
  Hits          580      580           
  Misses         46       46           
  Partials        7        7           

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