[typespec/http] namespace is missing in the parsed models for responses

[ArcturusZhang]

Playground: link

We expect we get a proper namespace for the return type of operation getServiceStatus, and it should be Azure.Core because this anonymous model is effectively defined inside the template therefore it might make sense.
But actually when we get this model back from

typespec/packages/http/src/types.ts

Line 465 in 04182d2

responses: HttpOperationResponseContent[];

the body.type (which is a model) has no namespace on it:

while its original model has namespace:

[tadelesh]

@allenjzhang do you have any progress for this?