Sergei Ustimenko

Cleanup HttpServerTransport.Dispatcher in Netty tests

8

### Description This PR introduces helper builders `TestDispatcherBuilder` in modules/Netty & plugins/Reactor Netty that simplify the way instances of `HttpTransport.Disaptcher` get created. It also includes some minor cleanups like remove...

[GRPC] Add handling for the grpc.detailed_errors.enabled setting and global gRPC error_trace parameter

34

### Description This PR introduces: 1. a new setting `grpc.detailed_errors.enabled` (much like the [similar http flag](https://docs.opensearch.org/latest/install-and-configure/configuring-opensearch/network-settings/#http-error-handling-settings).) 2. handling of the `globalParams#errorTrace` request parameter The `grpc.detailed_errors.enabled` has the same effect as...