[Extensions]Create a workflow to invoke the listeners of the extension points

[owaiskazi19]

Is your feature request related to a problem? Please describe.
Most of the extension points of OpenSearch has a nested listener attached which calls the sub method of the extension point. Create a general template to handle the TransportRequest and attach a listener to the extension points to invoke their sub methods.

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[owaiskazi19]

Tracked inhttps://github.com/opensearch-project/opensearch-sdk-java/issues/302