add a way to config GraphQL Codegen

### Is this related to a new or existing framework?

_No response_

### Is this related to a new or existing API?

_No response_

### Is this related to another service?

_No response_

### Describe the feature you'd like to request

I want to remove `__typename` from the `api.ts`, with the raw GraphQL Codegen, I could config this by the [skipTypename](https://www.graphql-code-generator.com/docs/plugins/typescript-operations) option, but how to config this in Amplify CLI ?

### Additional context

_No response_

### Is this something that you'd be interested in working on?

- [ ] 👋 I may be able to implement this feature request
- [ ] ⚠️ This feature might incur a breaking change