fix compile failed by wasmtime::component::Error dropped

[fuxiaohei]

This is fix for wasmtime::component::Error dropped from bytecodealliance/wasmtime#5397 to keep host compiling.

I found #32 and #26 talking about this case. PR is outdated and It seems a new design for HostResult is comming.

But now I'm trying to run wasm component-model with wasi host bindings. So I think host should be compiled correctly.

[sunfishcode]

Thanks! I think this makes sense. I expect there are more changes coming up for how we handle errors, but for now it's good to stay current with the bindings generator.

[sunfishcode]

There's one more failure now on main due to a test added in #45. If anyone's able to submit a PR that'd be great, otherwise I'll do it when I get a chance in a few days.

[dicej]

@sunfishcode #47