Fix terrain fog on globe

[ibesora]

Closes #4985

• Support Fog in Vertical Perspective with Terrain #4985

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 and coverable lines are covered by tests ✅

Project coverage is 90.85%. Comparing base (30ab703) to head (0c208b3).
Report is 47 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4924      +/-   ##
==========================================
- Coverage   91.81%   90.85%   -0.96%     
==========================================
  Files         279      279              
  Lines       38340    38335       -5     
  Branches     6698     6697       -1     
==========================================
- Hits        35200    34830     -370     
- Misses       3007     3341     +334     
- Partials      133      164      +31     

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[ibesora]

Closing this. Will reopen when I get more work done on it