fix: move incoming value ownership on consumption

[rvolosatovs]

Resource methods implicitly borrow the resource, however, to "consume" the value, ownership of it must be moved. In some way this is similar to https://github.com/WebAssembly/wasi-http/blob/37b91f4f78950f87db61e462ab6dacf85827bc64/wit/types.wit#L426