fix(popover): broken popover arrow caused by relative positionning

[Powerplex]

Description, Motivation and Context

Removing relative class on Popover.Content as it breaks Popover.Arrow positionning.

Types of changes

• 🪲 Bug fix (non-breaking change which fixes an issue)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e2c1271) 98.05% compared to head (4f239ad) 98.05%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1821   +/-   ##
=======================================
  Coverage   98.05%   98.05%           
=======================================
  Files         710      710           
  Lines        5045     5045           
  Branches     1833     1833           
=======================================
  Hits         4947     4947           
  Misses         98       98           

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