Expose original clientCtx (mostly for inproc interceptors)

[jhump]

mostly for inproc interceptors

I need more info. Why do we want inproc interceptors? The interceptors should be applicable to both in-process and out-of-process calls.

[dragonsinth]

While that is true, in practice I've noticed in practice that in-process channels often need particular values from the client context, such as a logger or authentication. Those in-process interceptors are currently setup to grab those necessary values from an unrelated, third context-- which only has the correct values through careful orchestration of client code. It's much better to be able to examine the original client context, which has the correct values already.

[dragonsinth]

Yeah, I think test code using in proc grpc to mocks is probably another good example of where this is useful.