Add vertical-align in format expression

[stanislawpuda-tomtom]

Related issue #832.

This PR introduces vertical align property to format expression. It enables to specify how each section should be positioned in relation to biggest element in line. There are three possible options:

• "baseline" default: text baseline or image bottom are in line - this is current behaviour.
• "center": image center or text center are in line.
• "top": image top and text top are in line

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 92.75%. Comparing base (89713fd) to head (1a5cf7c).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #900      +/-   ##
==========================================
+ Coverage   92.73%   92.75%   +0.02%     
==========================================
  Files         105      105              
  Lines        4683     4696      +13     
  Branches     1323     1329       +6     
==========================================
+ Hits         4343     4356      +13     
  Misses        340      340              

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