Correct the isStored flag for wildcard field type

[bugmakerrrrrr]

Description

The isStored flag of wildcard field type is incorrectly set to true.

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.

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[github-actions]

❕ Gradle check result for a3e9641: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.snapshots.DedicatedClusterSnapshotRestoreIT.testSnapshotWithStuckNode

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.50%. Comparing base (5666982) to head (a3e9641).
Report is 6 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #17440      +/-   ##
============================================
+ Coverage     72.49%   72.50%   +0.01%     
- Complexity    65717    65718       +1     
============================================
  Files          5303     5303              
  Lines        304793   304793              
  Branches      44202    44202              
============================================
+ Hits         220966   221000      +34     
+ Misses        65693    65642      -51     
- Partials      18134    18151      +17     

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