[Backport 1.3] Set analyzer to regex query string search

[opensearch-trigger-bot]

Backport ea4cfcc from #3967

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/1748/
• CommitID: 3970b43

[codecov-commenter]

Codecov Report

Merging #4220 (3970b43) into 1.3 (6cabc6a) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                1.3    #4220      +/-   ##
============================================
- Coverage     77.91%   77.87%   -0.04%     
+ Complexity    63474    63413      -61     
============================================
  Files          4453     4453              
  Lines        274899   274900       +1     
  Branches      41165    41163       -2     
============================================
- Hits         214189   214091      -98     
- Misses        43854    43921      +67     
- Partials      16856    16888      +32     

Impacted Files	Coverage Δ
...pensearch/index/search/QueryStringQueryParser.java	76.47% <100.00%> (+0.86%)	⬆️
...g/opensearch/index/analysis/CharFilterFactory.java	0.00% <0.00%> (-100.00%)	⬇️
...nsearch/indices/recovery/PeerRecoveryNotFound.java	0.00% <0.00%> (-100.00%)	⬇️
...nsearch/search/dfs/DfsPhaseExecutionException.java	0.00% <0.00%> (-66.67%)	⬇️
...ch/index/shard/ShardNotInPrimaryModeException.java	50.00% <0.00%> (-50.00%)	⬇️
.../action/ingest/SimulatePipelineRequestBuilder.java	0.00% <0.00%> (-50.00%)	⬇️
...n/indices/upgrade/post/UpgradeSettingsRequest.java	30.00% <0.00%> (-45.00%)	⬇️
...java/org/opensearch/script/ScriptContextStats.java	33.33% <0.00%> (-40.01%)	⬇️
...search/discovery/zen/PublishClusterStateStats.java	58.33% <0.00%> (-37.51%)	⬇️
...search/discovery/zen/PendingClusterStateStats.java	56.00% <0.00%> (-36.00%)	⬇️
... and 451 more

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[AmiStrn]

@andrross any idea why the DCO check would fail here? this was generated by the bot

[dblock]

Expected "Yogev Mets [[email protected]](mailto:[email protected])", but got "yyyogev [[email protected]](mailto:[email protected])".

🤷 The easiest is to amend this probably.

[AmiStrn]

Hi @dblock !

🤷 The easiest is to amend this probably.

can I do this or is @yyyogev the only one who can amend that?

[dblock]

@AmiStrn I think you can replace this PR with one that has correct DCO?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/2746/
• CommitID: 72a8e2a