PrefixStore::head doesn't strip prefix from meta.location

[liamdiprose]

Describe the bug

Calling .head() on a prefix store returns an ObjectMeta with a .location that contains the prefix. Other methods such as .list() strip the prefix: https://docs.rs/object_store/latest/src/object_store/prefix.rs.html#146

To Reproduce

let store = PrefixStore::new("client-jail", InMemory::new());
let path = Path::from("my-file");
match store.head(&path).await {
  Ok(meta) => {
    store.get(meta.location).await.expect("to not try open client-jail/client-jail/my-file");
  ...

Expected behavior

From prefix.rs, I think PrefixStore's head() method needs to call strip_meta.

Current Workaround
Reusing the path passed into head().

Thank you ❤️

[kylebarron]

I think the issue here is that get_opts needs to change the prefix of the ObjectMeta it returns

arrow-rs-object-store/src/prefix.rs

Lines 118 to 121 in bdcac43

	async fn get_opts(&self, location: &Path, options: GetOptions) -> Result<GetResult> {
	let full_path = self.full_path(location);
	self.inner.get_opts(&full_path, options).await
	}