Remove calls to `wasm-tools component new` and generate wasi 0.2.0 component directly

[jsturtevant]

After dotnet/runtimelab#2614 merges, we will no longer need to call component new as the compiler will produce wasi p2 components directly.

This is an issue to track that change once the pr merges

[jsturtevant]

We will still want to include wasm-tools to do things like "compose" together two modules. See https://github.com/bytecodealliance/componentize-dotnet/tree/main/samples/calculator/CalculatorComposed as an example