Make aria-label configurable for Map, Marker and Popup

[thom4parisot]

Map <canvas> default aria-label, Marker default aria-label and Popup default close button aria-label are made configurable to suit better the web page locale.

Also, the <canvas> element is keyboard focusable (tabindex="0") only when the map is interactive. Otherwise, it acts as an illustration—maybe it should be reflected as a role="presentation" attribute?

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 86.78%. Comparing base (daa947c) to head (1625517).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4147      +/-   ##
==========================================
+ Coverage   86.73%   86.78%   +0.04%     
==========================================
  Files         242      242              
  Lines       33071    33076       +5     
  Branches     2029     2040      +11     
==========================================
+ Hits        28685    28704      +19     
+ Misses       3402     3378      -24     
- Partials      984      994      +10     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[HarelM]

Thanks! Can you add a changelog item please?

[thom4parisot]

Hi @HarelM, I've proceeded to a couple more changes as well as reflecting them with tests and CHANGELOG entries.

We are in the process of auditing the accessibility of a map-heavy application (https://cartobio.agencebio.org) with the French guidelines (RGAA—a port of WCAG). So I'm happy to contribute more changes as we go along.

[HarelM]

Check out the following issues which are related to accessibility. I was unable to understand how to solve them, but you might be able to:
https://github.com/maplibre/maplibre-gl-js/issues?q=is%3Aissue+accessibility

Any progress in that front would be great.