feat(client,server): remove tcp feature and code (#2929)

This removes the `tcp` feature from hyper's `Cargo.toml`, and the code it enabled:

- `HttpConnector`
- `GaiResolver`
- `AddrStream`

And parts of `Client` and `Server` that used those types. Alternatives will be available in the `hyper-util` crate.

Closes #2856 
Co-authored-by: MrGunflame <mrgunflame@protonmail.com>

src/body/body.rs

@@ -608,6 +608,7 @@ mod tests {
         );
     }
 
+    #[cfg(not(miri))]
     #[tokio::test]
     async fn channel_abort() {
         let (tx, mut rx) = Body::channel();
@@ -618,6 +619,7 @@ mod tests {
         assert!(err.is_body_write_aborted(), "{:?}", err);
     }
 
+    #[cfg(not(miri))]
     #[tokio::test]
     async fn channel_abort_when_buffer_is_full() {
         let (mut tx, mut rx) = Body::channel();
@@ -644,6 +646,7 @@ mod tests {
         assert_eq!(chunk2, "chunk 2");
     }
 
+    #[cfg(not(miri))]
     #[tokio::test]
     async fn channel_empty() {
         let (_, mut rx) = Body::channel();