Runtime and client codegen support for improved server protocol dispatcher (#822)

* Runtime and client codegen support for improved server protocol dispatcher

Implement Rust runtime defining the traits used by the server to build operations
parsers/serializers:
  * ParseHttpRequest
  * SerializeHttpResponse
  * SerializeHttpError

Refactor ProtocolSupport to allow server configurations:
  * requestDeserialization (bool)
  * requestBodyDeserialization (bool)
  * responseSerialization(bool)
  * errorSerialization(bool)

Change visibility of HttpBoundProtocolGenerator methods to allow to use
them in the server generator

Co-authored-by: Russell Cohen <rcoh@amazon.com>
Co-authored-by: david-perez <d@vidp.dev>