rust-1.72.0 changes (#5255)

Prepare to upgrade rust version to latest stable.

- `rustfmt` has learned to format `let irrefutable = $expr else { ...
};` blocks
- There's a new warning about virtual (workspace) crate resolver, picked
the latest resolver as I suspect everyone would expect it to be the
latest; should not matter anyways
- Some new clippies, which seem alright

libs/pq_proto/src/lib.rs

@@ -959,7 +959,7 @@ mod tests {
         let make_params = |options| StartupMessageParams::new([("options", options)]);
 
         let params = StartupMessageParams::new([]);
-        assert!(matches!(params.options_escaped(), None));
+        assert!(params.options_escaped().is_none());
 
         let params = make_params("");
         assert!(split_options(&params).is_empty());

libs/remote_storage/src/s3_bucket.rs

@@ -573,7 +573,7 @@ mod tests {
 
     #[test]
     fn relative_path() {
-        let all_paths = vec!["", "some/path", "some/path/"];
+        let all_paths = ["", "some/path", "some/path/"];
         let all_paths: Vec<RemotePath> = all_paths
             .iter()
             .map(|x| RemotePath::new(Path::new(x)).expect("bad path"))