chore: Alternative style api for alert

[pan-kot]

Description

Updates alert's style api to use eligible properties instead of tokens.

How has this been tested?

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.70%. Comparing base (a8c4713) to head (c51ccf5).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5122   +/-   ##
=======================================
  Coverage   97.70%   97.70%           
=======================================
  Files         990      990           
  Lines       31818    31820    +2     
  Branches    11753    11754    +1     
=======================================
+ Hits        31089    31091    +2     
  Misses        683      683           
  Partials       46       46           

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