Refactor asyncapi binding to simplify SSE asyncapi bindings extension

[jfallows]

Description

Refactor asyncapi binding

• remove custom 3.0.2-zilla asyncapi version schema
• model includes zilla specific bindings extensions via x- prefix
• view spans entire model at creation
• view handles resolution of model refs
• view handles resolution of server variables
• simplify composite generators for client, server and proxy
• use fluent builder apis to maintain code structure reflecting config syntax
• introduce composite id in frame extension and with config
• generated config includes per route with config composite id referencing apiId and operation
• http, sse, mqtt, http-kafka, sse-kafka, mqtt-kafka include with composite id in routed begin frame
• use composite id to efficiently determine apiId and operation when composite begin frame arrives at asyncapi binding

Fixes #1151

[bmaidics]

Please remove this include as we don't use our own Asyncapi scheme (also it was removed).