tonic-reflection: 🆕 use `v1` reflection protobuffer definitions

[cratelyn]

this fixes #1685.

in penumbra-zone/penumbra#4392, we observed that tonic servers do not properly support reflection when servicing a request sent by recent versions of grpcurl, after v1.8.8 began using grpc.reflection.v1.ServerReflection. (see fullstorydev/grpcurl#407)

that leads to an error regarding an unexpected status code, like this:

❯ grpcurl --version
grpcurl v1.9.1

❯ grpcurl -vv grpc.testnet.penumbra.zone:443 list
Failed to list services: rpc error: code = Unknown desc = unexpected HTTP status code received from server: 405 (Method Not Allowed); malformed header: missing HTTP content-type

this adds the v1 reflection definition to tonic-reflection, which was observed as fixing these issues for our gRPC endpoint.

🩹 changes

changes in this commit are as follows:

• vendors the v1 definition of reflection.proto.

• renames the (deprecated) v1alpha definition to reflection_v1alpha.proto.

• tonic_reflection::generated::grpc_reflection_v1 links to the generated Rust code (created by running cargo run --package codegen).

• tonic_reflection::generated::FILE_DESCRIPTOR_SET is replaced by tonic_reflection::generated::{FILE_DESCRIPTOR_SET_V1ALPHA, FILE_DESCRIPTOR_SET_V1}.

• tonic_reflection::pb now contains namespaced tonic_reflection::pb::{v1alpha, v1} submodules. (NB: this is a breaking change to the public tonic-reflection API.)

• tonic_reflection::server is updated to use the generated tonic_reflection::pb::v1 code.

---

fixes: #1685 x-ref: penumbra-zone/penumbra#4392

[cratelyn]

debugged ci over in my fork here. pardon the noise, this should be ready for a review now!

[LucioFranco]

@cratelyn sorry for the delay would you be able to resolve conflicts and then we can merge this?

[cratelyn]

@cratelyn sorry for the delay would you be able to resolve conflicts and then we can merge this?

@LucioFranco i sure can! :slightly_smiling_face: i've rebased this on the latest main.

[cratelyn]

...and once more, rebased on main!