Enable include_named_queries_score to be used in msearch

[jdddog]

Enables support for the include_named_queries_score query parameter in the msearch endpoint.

It also fixes an bug with the search endpoint where setting include_named_queries_score to true
in the request body (rather than as a URL query parameter) would trigger the computation of named query scores
but not include them in the SearchHit output. This was because SearchHit previosuly used the URL query parameter
to determine whether to write the scores, instead of checking if the scores were present. Fixing this also enables
include_named_queries_score to be specified in individual search request bodies in msearch with no query parameter.

Do I need to

Related Issues

Resolves #19102
API changes companion pull request opensearch-project/opensearch-api-specification#955
Public documentation issue/PR opensearch-project/documentation-website#10888

Check List

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

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[github-actions]

❌ Gradle check result for ea16a22: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 4b3abd8: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for 1c57e24: SUCCESS

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.04%. Comparing base (39b7a59) to head (7f2bed8).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...src/main/java/org/opensearch/search/SearchHit.java	0.00%	0 Missing and 2 partials ⚠️
...main/java/org/opensearch/search/SearchService.java	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #19241      +/-   ##
============================================
+ Coverage     73.00%   73.04%   +0.04%     
- Complexity    70534    70540       +6     
============================================
  Files          5719     5719              
  Lines        323260   323266       +6     
  Branches      46816    46819       +3     
============================================
+ Hits         235993   236136     +143     
+ Misses        68224    68072     -152     
- Partials      19043    19058      +15     

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[github-actions]

✅ Gradle check result for f241c28: SUCCESS

[github-actions]

✅ Gradle check result for 7f2bed8: SUCCESS

[github-actions]

✅ Gradle check result for c7f01b7: SUCCESS

[jdddog]

Hey @msfroh, thanks for the tips about how to fix the issue, you couldn't take a look at the PR could you?

[opensearch-trigger-bot]

This PR is stalled because it has been open for 30 days with no activity.