feat(oss-opensearch): Add memory-optimized search configuration option

[Akhil-Pathivada]

Summary

Adds support for memory-optimized search in OSS OpenSearch. This feature is available for OpenSearch 3.1+ with the FAISS engine.

Changes

Backend

• Added memory_optimized_search parameter to OSSOpenSearchIndexConfig class
• Implemented version-specific setting rule in VERSION_SPECIFIC_SETTING_RULES that automatically applies knn.memory_optimized_search setting when:
  • OpenSearch version >= 3.1
  • Engine is FAISS
  • memory_optimized_search is enabled

Frontend

• Added memory_optimized_search to CaseConfigParamType enum
• Created CaseConfigParamInput_MEMORY_OPTIMIZED_SEARCH_OSSOpensearch UI input component
• Added the input to both AWSOpensearchLoadingConfig and AWSOpenSearchPerformanceConfig lists
• Input is conditionally displayed only when FAISS engine is selected

Testing

• Verified setting is correctly applied to index settings (knn.memory_optimized_search: true)
• Confirmed conditional UI display based on engine type
• Tested with OpenSearch 3.1.0 and FAISS engine
• Validated that setting is only applied when all conditions are met

[Akhil-Pathivada]

/assign @alwayslove2013

[sre-ci-robot]

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This pull-request has been approved by: Akhil-Pathivada, alwayslove2013
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