fix(table-header): decorator wrapper

[ariellalgilmore]

Closes #18490

Current (extra space for decorator wrapper but no decorator is being used):

New Changes (only have space when decorator is being used):

Changelog

Changed

• the data table header needed styles to hide the decorator from being visual when there was no decorator there

Testing / Reviewing

data table AI story: confirm AI Label is still there
data table sorting story: when hovering the sorting icons should not have any extra space next to them. the decorator class should not be present

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.59%. Comparing base (eacd2b7) to head (f9933ff).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #19283   +/-   ##
=======================================
  Coverage   84.59%   84.59%           
=======================================
  Files         380      380           
  Lines       14471    14471           
  Branches     4768     4716   -52     
=======================================
  Hits        12242    12242           
  Misses       2075     2075           
  Partials      154      154           

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[heloiselui]

LGTM!

[carbon-automation]

Hey there! v11.82.0 was just released that references this issue/PR.