remote: Fetch shell on ssh remote to use for preparing commands (#36690)

Prerequisite for https://github.com/zed-industries/zed/pull/36576 to
allow us to differentiate the shell in a remote.

Release Notes:

- N/A

crates/util/src/paths.rs

@@ -166,7 +166,7 @@ impl<T: AsRef<Path>> From<T> for SanitizedPath {
     }
 }
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum PathStyle {
     Posix,
     Windows,