Invoke the extension point based on the request from OpenSearch to unblock Latency Testing

[owaiskazi19]

Is your feature request related to a problem? Please describe.
Once the communication is done between OpenSearch and SDK

• Create a mechanism to invoke extension point for the custom plugin
• Based on the request invoke the right extension point
• Integrate SDK with custom extension and invoke it's extension points

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
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Additional context
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