refactor(tvix/*store/sled): make ::new() more generic

We don't really require the Path to be a PathBuf, we don't even require
it to be a Path, we only need it to be AsRef<Path>>.

This removes some conversion in the from_addr cases, which can just
reuse `url.path()` (a `&str`).

Change-Id: I38d536dbaf0b44421e41f211a9ad2b13605179e9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10258
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI

tvix/store/src/pathinfoservice/from_addr.rs

@@ -63,7 +63,7 @@ pub async fn from_addr(
             ));
         }
         return Ok(Arc::new(
-            SledPathInfoService::new(url.path().into(), blob_service, directory_service)
+            SledPathInfoService::new(url.path(), blob_service, directory_service)
                 .map_err(|e| Error::StorageError(e.to_string()))?,
         ));
     } else if url.scheme() == "nix+http" || url.scheme() == "nix+https" {