This addition unlocks the ability to use Go with the component model. The component model layers on top of Wasm Modules - a module which imports and exports fun

This addition unlocks the ability to use Go with the component model. The component model layers on top of Wasm Modules - a module which imports and exports functions with the component model ABI can be turned into a component using e.g. `wasm-tools component new`, and that transformation can include adapting wasip1 interfaces to wasip2. Without support for declaring export functions besides `main`, Go could only target the wasip2 CLI command world, but this enables it to target any component model world.