fix: add new plugin

[sahanajadav]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Description

Add new plugins

• analysis-icu
• analysis-kuromoji

Related Tickets & Documents

• Related Issue #
• Closes #

QA Instructions, Screenshots, Recordings

1. Verified plugin installation using:

curl -k -u admin:admin https://localhost:9200/_cat/plugins?v

Confirmed presence of:

• analysis-icu
• analysis-kuromoji

on all OpenSearch nodes.

2. Functional validation for analysis-kuromoji plugin:

Created analyzer/index using kuromoji_tokenizer:

curl -k -u admin:admin -X PUT "https://localhost:9200/ja_test" \
-H "Content-Type: application/json" \
-d '{
  "settings": {
    "analysis": {
      "analyzer": {
        "ja_analyzer": {
          "type": "custom",
          "tokenizer": "kuromoji_tokenizer"
        }
      }
    }
  }
}'

Verified Japanese text tokenization using OpenSearch _analyze API:

curl -k -u admin:admin -X GET "https://localhost:9200/ja_test/_analyze" \
-H "Content-Type: application/json" \
-d '{
  "analyzer": "ja_analyzer",
  "text": "寿司が食べたい"
}'

This confirms the plugins are properly installed, loaded, and functioning at runtime.

Breaking Change checklist

If your PR includes any deployment or processing changes, please utilize this checklist:

• Does it change any deployment parameters, logic of their working or rename them?
• Did update from previous version tested with the same set of deployment parameters?

Added/updated tests?

• Yes
• No, and this is why: please replace this line with details on why tests
  have not been included
• I need help with writing tests

[optional] Are there any things to highlight or double check?

[optional] What gif best describes this PR or how it makes you feel?

[github-actions]

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[defesteban]

Please, add description how you tested new plugins.

[sahanajadav]

Please, add description how you tested new plugins.

Updated testing details.