fix: Prevent filtering highlighting from crashing when match is >10000 chars

[avinashbot]

Description

Reported by a user on Slack. This is just #1885 but the limit is set even lower. Based on empirical testing, the regex limit seems to be set at 32768 characters now.

We initially set it to 100,000 characters last time to avoid breaking any legitimate workflows and it worked in previous Chrome versions. But in retrospect, autosuggest matches with over 10,000 characters are probably well past most reasonable uses of the component anyway, so this should be fine.

Related links, issue #, if available: n/a

How has this been tested?

Updated the tests.

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 96.41%. Comparing base (645d7db) to head (9f0b5f7).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3290   +/-   ##
=======================================
  Coverage   96.41%   96.41%           
=======================================
  Files         791      791           
  Lines       22563    22563           
  Branches     7786     7726   -60     
=======================================
  Hits        21755    21755           
+ Misses        801      754   -47     
- Partials        7       54   +47     

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