refactor: OPTIC-1557: Remove Stale Feature Flag - fflag_fix_front_lsd…

[luarmr]

Remove stalled feature flag

fflag_fix_front_lsdv_4992_hide_all_regions_04052023_short -> true

I separated this one because, in a previous attempt, some tests were failing so confirming if need extra attention It was a simple oversight.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.90%. Comparing base (d7bac84) to head (d08ef13).
Report is 20 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6997      +/-   ##
===========================================
- Coverage    76.90%   76.90%   -0.01%     
===========================================
  Files          175      175              
  Lines        14162    14165       +3     
===========================================
+ Hits         10891    10893       +2     
- Misses        3271     3272       +1     

Flag	Coverage Δ
pytests	76.90% <ø> (-0.01%)	⬇️

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