Throw instead of returning `undefined` when `requireNodeAddon` fails to load

[kraenhansen]

We're currently returning undefined when a module fails to load: https://github.com/callstackincubator/react-native-node-api-modules/blob/8a76cf8e39f3ab1cbf0e68e0ff7fb00d3b355b31/packages/react-native-node-api-modules/cpp/CxxNodeApiHostModule.cpp#L37

I feels like an unrecoverable state to me, which might be easier to discover and resolve if we threw an error with a proper error message instead.