Use Arc::clone in Collection::clone_with_type

[PhotonQuantum]

Current clone_with_type implementation includes calling builder and constructing a new CollectionInner instance.
Given that CollectionInner is wrapped in an Arc, and generic T isn't included in CollectionInner, is there any possibility that we refactor clone_with_type into Self{inner: self.inner.clone(), _phantom: Default::default()}?

[patrickfreed]

Hi @PhontonQuantum, thanks for bringing this up! We think that would be a nice improvement and would be happy to merge such a change if you'd like to submit a PR for it.