Is your feature request related to a problem? Please describe.
The meta issue to track the Streaming Indexing API progress

Describe the solution you'd like
As outcome of the #5001 & #7273, we have outlined the way such steaming support could be integrated into OpenSearch.

• [Streaming Indexing] Introduce new experimental server HTTP transport based on Netty 4 and Project Reactor (Reactor Netty) #9067
• [DOC] Document new experimental HTTP transport based on Netty 4 and Project Reactor documentation-website#5540
• [Streaming Indexing] Ensure support of the new transport by security plugin #9068
• [Streaming Indexing] Introduce Project Reactor to OpenSearch core (dependencies) #9069
• [Streaming Indexing] Enhance RestAction with streaming support #9071
• [Streaming Indexing] Introduce bulk HTTP API streaming flavour #9070
• [Streaming Indexing] Enhance RestClient with a new streaming API support #9072
• [Streaming Indexing] Enhance OpenSearch Java Client with a new streaming API support #9075
• [Streaming Indexing] Introduce bulk Protofobuf API streaming flavour #15447
• [BUG] [Streaming Indexing] Fix intermittent "The bulk request must be terminated by a newline [\\n]" failures #16214

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Additional context
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