[Backport 3.3] Add name validation to index prefix

[opensearch-trigger-bot]

Backport f8b403b from #4332

[codecov]

Codecov Report

❌ Patch coverage is 70.94017% with 68 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.10%. Comparing base (592a193) to head (43f4996).
⚠️ Report is 1 commits behind head on 3.3.

Files with missing lines	Patch %	Lines
...emorycontainer/memory/MemoryProcessingService.java	72.63%	12 Missing and 14 partials ⚠️
...rycontainer/memory/TransportAddMemoriesAction.java	45.71%	16 Missing and 3 partials ⚠️
...ontainer/TransportDeleteMemoryContainerAction.java	76.00%	3 Missing and 3 partials ⚠️
...earch/ml/helper/MemoryContainerPipelineHelper.java	53.84%	6 Missing ⚠️
...ontainer/TransportUpdateMemoryContainerAction.java	58.33%	5 Missing ⚠️
...ontainer/TransportCreateMemoryContainerAction.java	81.81%	2 Missing ⚠️
...l/action/session/TransportCreateSessionAction.java	66.66%	2 Missing ⚠️
...on/memorycontainer/memory/MemorySearchService.java	75.00%	1 Missing ⚠️
...ycontainer/memory/TransportDeleteMemoryAction.java	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                3.3    #4346      +/-   ##
============================================
- Coverage     80.11%   80.10%   -0.02%     
- Complexity    10171    10197      +26     
============================================
  Files           855      855              
  Lines         44238    44358     +120     
  Branches       5113     5133      +20     
============================================
+ Hits          35441    35532      +91     
- Misses         6646     6661      +15     
- Partials       2151     2165      +14     

Flag	Coverage Δ
ml-commons	80.10% <70.94%> (-0.02%)	⬇️

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