Deprecate routing processor

[djaglowski]

Component(s)

No response

Describe the issue you're reporting

I believe the routing connector now supports all functionality that the processor supports, aside from the legacy from_attribute. This includes routing by grpc request headers, http request headers, resource context, span context, metric context, data point context, and log context. Additionally, routing is much more flexible because each routing table item may evaluate in a different context.