Add get bounds to geojson source

[HarelM]

Launch Checklist

• This supersedes Added geoJSON source getBounds method #5403
• Resolves Add getBounds() method to geoJSON sources #5394

This adds getBounds to geojson source.

• 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.
• Write tests for all new functionality.
• Document any changes to public APIs.
• Add an entry to CHANGELOG.md under the ## main section.

[codecov]

Codecov Report

Attention: Patch coverage is 93.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 76.17%. Comparing base (c238479) to head (77ca78f).

Files with missing lines	Patch %	Lines
src/source/geojson_source.ts	93.33%	2 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (c238479) and HEAD (77ca78f). Click for more details.

HEAD has 7 uploads less than BASE

Flag	BASE (c238479)	HEAD (77ca78f)
	9	2

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5575       +/-   ##
===========================================
- Coverage   91.96%   76.17%   -15.79%     
===========================================
  Files         282      281        -1     
  Lines       39079    33782     -5297     
  Branches     6873     6598      -275     
===========================================
- Hits        35938    25734    -10204     
- Misses       3013     8048     +5035     
+ Partials      128        0      -128     

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