Support for Args and related module types in GraphQL Module Resolvers

When I use the graphql-modules preset, I don't get typings like MutationCreateAuthMethodsArgs in the module generated file but I do get it in the overall codegen file

For eg: I have this in overall codegen file:
```ts
/** Auth Method Mutations */
export type MutationCreateAuthMethodsArgs = {
input?: Maybe>>;
};
```

But not in the module file. I just have this:
```ts
export type createAuthMethodsInput = Pick;
```

I use the type in the provider like this:
```ts
async create(context: GraphQLModules.Context, args: GQLTypes.MutationCreateAuthMethodsArgs) {
}
```

but not able to do that now.

The typing works well in resolvers, but this is what I do in my resolver:

```ts
createAuthMethods: async (_parent, args, context: GraphQLModules.Context) => {
let result = await context.injector.get(AuthMethod).create(context, args);
return result;
},
```

Thanks. Will use the global typed file as of now.

**CC:** @dotansimha