Persist Wasmtime keyvalue

The keyvalue implementation supports an in-memory lookup out of the box.

However, I don't see how to persist values across instantiations, or share the same lookup between component instances.

It looks to me like this is an intentional choice, where the bucket is always created anew, and data is always cloned upon bucket opening: https://github.com/bytecodealliance/wasmtime/blob/5bb5d0080c97d291a7127436884cc50cce084716/crates/wasi-keyvalue/src/lib.rs#L170

Am I missing something here? If it's always created fresh, isn't this essentially the same as a component just creating it's own `HashMap` (albeit with some initial values populated)?