issue with introspection of JsonSubTypes

[sdelamo]

Test fails with:

java.lang.InstantiationError: io.micronaut.configuration.graphql.ws.Message
	at io.micronaut.configuration.graphql.ws.$Message$Introspection.instantiateInternal(Unknown Source)
	at io.micronaut.inject.beans.AbstractInitializableBeanIntrospection$IntrospectionBuilder.build(AbstractInitializableBeanIntrospection.java:818)
	at io.micronaut.inject.beans.AbstractInitializableBeanIntrospection$IntrospectionBuilder.build(AbstractInitializableBeanIntrospection.java:764)
	at io.micronaut.http.bind.binders.QueryValueArgumentBinder.bindPojo(QueryValueArgumentBinder.java:194)
	at io.micronaut.http.bind.binders.QueryValueArgumentBinder.bind(QueryValueArgumentBinder.java:104)
	at io.micronaut.http.bind.binders.QueryValueArgumentBinder.bind(QueryValueArgumentBinder.java:47)

Message using JsonSubtypes:

https://github.com/micronaut-projects/micronaut-graphql/blob/5.0.x/graphql/src/main/java/io/micronaut/configuration/graphql/ws/Message.java#L44-L53

[sdelamo]

@dstepanov

Looks like it's broken by some new core commit
also I see
java.lang.ClassCastException: class io.netty.handler.codec.http.websocketx.CloseWebSocketFrame cannot be cast to class io.netty.handler.codec.http.HttpRequest (io.netty.handler.codec.http.websocketx.CloseWebSocketFrame and io.netty.handler.codec.http.HttpRequest are in unnamed module of loader 'app')