Change the default value of doc_values in WildcardFieldMapper to true

[kkewwei]

Description

Currently, WildcardFieldMapper has doc_values set to false by default. This default configuration triggers unnecessary exceptions. Also to align with the default settings of other mappings, we will change the default value of doc_values to true.

As we always serialize this parameter, no matter its value, it's also backward compatibility.

Related Issues

Resolves #18678

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 81f4999: 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 d3e2673: SUCCESS

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 73.16%. Comparing base (8dd1286) to head (f79e947).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...g/opensearch/index/mapper/WildcardFieldMapper.java	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #19796      +/-   ##
============================================
+ Coverage     73.12%   73.16%   +0.04%     
- Complexity    71099    71137      +38     
============================================
  Files          5754     5754              
  Lines        325296   325296              
  Branches      47052    47052              
============================================
+ Hits         237868   238003     +135     
+ Misses        68282    68105     -177     
- Partials      19146    19188      +42     

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[github-actions]

❌ Gradle check result for dda919a: 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 f79e947: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.