docs: clarify docs for production checklist

The [docs](https://docs.hasura.io/1.0/graphql/manual/deployment/production-checklist.html#disable-apis) mention that in most scenarios the only API that needs to be enabled in production is the `graphql` API.

The [docs](https://docs.hasura.io/1.0/graphql/manual/deployment/production-checklist.html#disable-console) also mention that it's recommended to disable the console, but that "You can still use the CLI to open a console connected to this instance. (Provided metadata APIs are not disabled)."

What is the recommended approach to running migrations in production? If the `metadata` API is disabled then there will be no way to interact with the server via the console or the CLI

Thanks for your help!