Enhance bitset indices performance

[muendlein]

• issues: fixes Enhance performance of _paint in glyph_renderer #14427
• tests added / passed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (branch-3.8@3809c69). Learn more about missing BASE report.

Additional details and impacted files

@@              Coverage Diff              @@
##             branch-3.8   #14428   +/-   ##
=============================================
  Coverage              ?   93.25%           
=============================================
  Files                 ?      284           
  Lines                 ?    20141           
  Branches              ?        0           
=============================================
  Hits                  ?    18783           
  Misses                ?     1358           
  Partials              ?        0           

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