Redesign WebSocket API to be configurable without combinatorial explosion of API methods

[jstarry]

Describe the feature you'd like
Builder-style API for creating a WebSocketService in a configurable way.

Is your feature request related to a problem? Please describe. (Optional)
Every time we add a new feature to the WebSocketService the api method surface area can increase substantially.

Additional context (Optional)
Discussion here: #1509

[ranile]

WebSocketService was removed in #1842 so this is no longer relevant.