[Backport 2.19] Add highlighting for match_only_text type (#17101)

[msfroh]

Description

Manual backport of #17101

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

✅ Gradle check result for dc0ebf6: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 72.40%. Comparing base (93c072b) to head (dc0ebf6).
Report is 1 commits behind head on 2.19.

Files with missing lines	Patch %	Lines
...earch/fetch/subphase/highlight/HighlightPhase.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               2.19   #17214      +/-   ##
============================================
+ Coverage     72.00%   72.40%   +0.40%     
- Complexity    66007    66325     +318     
============================================
  Files          5341     5341              
  Lines        307137   307138       +1     
  Branches      44826    44827       +1     
============================================
+ Hits         221143   222392    +1249     
+ Misses        67528    66509    -1019     
+ Partials      18466    18237     -229     

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