Non-borrowing rust bindings about wgpu

[zakarumych]

It would be surprising for user that assume unique ownership to find out copies of his resources because another crate in dependency graph enabled that feature.

[kvark]

@omni-viral good point (although, again, it's not critical - it's not making the library unsafe). We should make it so that situation is impossible. The point of providing a feature here is not to allow different clients to enabled or disable it, but to keep the same code base.

[zakarumych]

I see what you mean. But this means user can't rely on uniqueness of the resource id if he gives a reference to it somewhere.
In this case I can't see any reason to have it under feature gate.

[cwfitzgerald]

Superseded by #1453.