Upgrade proxy crates to edition 2024 (#10942)

This upgrades the `proxy/` crate as well as the forked libraries in
`libs/proxy/` to edition 2024.

Also reformats the imports of those forked libraries via:

```
cargo +nightly fmt -p proxy -p postgres-protocol2 -p postgres-types2 -p tokio-postgres2 -- -l --config imports_granularity=Module,group_imports=StdExternalCrate,reorder_imports=true
```

It can be read commit-by-commit: the first commit has no formatting
changes, only changes to accomodate the new edition.

Part of #10918

libs/proxy/postgres-types2/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "postgres-types2"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 license = "MIT/Apache-2.0"
 
 [dependencies]

libs/proxy/postgres-types2/src/lib.rs

@@ -4,19 +4,18 @@
 //! unless you want to define your own `ToSql` or `FromSql` definitions.
 #![warn(clippy::all, missing_docs)]
 
-use fallible_iterator::FallibleIterator;
-use postgres_protocol2::types;
 use std::any::type_name;
 use std::error::Error;
 use std::fmt;
 use std::sync::Arc;
 
-use crate::type_gen::{Inner, Other};
-
+use bytes::BytesMut;
+use fallible_iterator::FallibleIterator;
 #[doc(inline)]
 pub use postgres_protocol2::Oid;
+use postgres_protocol2::types;
 
-use bytes::BytesMut;
+use crate::type_gen::{Inner, Other};
 
 /// Generates a simple implementation of `ToSql::accepts` which accepts the
 /// types passed to it.

libs/proxy/postgres-types2/src/private.rs

@@ -1,7 +1,9 @@
-use crate::{FromSql, Type};
-pub use bytes::BytesMut;
 use std::error::Error;
 
+pub use bytes::BytesMut;
+
+use crate::{FromSql, Type};
+
 pub fn read_be_i32(buf: &mut &[u8]) -> Result<i32, Box<dyn Error + Sync + Send>> {
     if buf.len() < 4 {
         return Err("invalid buffer size".into());