localIdeographs render test set pixelRatio = 2 [#3006]

[bdon]

@HarelM I should have set this in the previous PR #3166 . This simulates a "retina" device such that the next changeset in #3006 is more clear. (Will let CI fail and then update committed expected images with new 2x size images.)

Launch Checklist

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Link to related issues.
• Include before/after visuals or gifs if this PR includes visual changes.
• Write tests for all new functionality.
• Document any changes to public APIs.
• Post benchmark scores.
• Add an entry to CHANGELOG.md under the ## main section.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (e5dd5a0) 75.11% compared to head (75c5595) 75.11%.
Report is 15 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3186   +/-   ##
=======================================
  Coverage   75.11%   75.11%           
=======================================
  Files         240      240           
  Lines       19170    19170           
  Branches     4325     4325           
=======================================
  Hits        14400    14400           
  Misses       4770     4770           

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[bdon]

Images added, PTAL