Malformed response for non `Ok` statuses when using `web_tonic` on the server.

## Bug Report
### Version

`tonic 0.11.0`
`tonic_web 0.11.0`
`tonic_web_wasm_client 0.5.1`

### Platform

Linux zb 6.8.1-arch1-1 #1 SMP PREEMPT_DYNAMIC Sat, 16 Mar 2024 17:15:35 +0000 x86_64 GNU/Linux

### Description

I switched from using the traefik reverse proxy for the grpc-web translation layer to the `tonic_web` crate by simply adding the `.accept_http1(true)` and `.layer(GrpcWebLayer::new())` calls to the server builder. When I'm using traefik, everything works fine.

Using `tonic_web`, when `Ok` responses are returned, everything works fine. However, when a non `Ok` status is returned (e.g., `Internal` or `NotFound`), I get the following error on the client:

`Error: Status { code: Unknown, message: "malformed response", metadata: MetadataMap { headers: {"content-length": "0", "content-type": "application/grpc-web+proto"} }, source: Some(MalformedResponse) }!`

I am using the unofficial `tonic_web_wasm_client` since I couldn't get the `tonic_web` client working, as the example is outdated, and I couldn't figure out what to use instead of the `hyper::Client` object. Since it is working with the traefik proxy, I'm guessing the issue is in the new translation layer, not the client crate.