fix(compose/hoist-field): create new field if the target does not exist

[ardatan]

If the target hoisted field is a new field name that doesn't exist, create that field and keep the
existing one;

createHoistFieldTransform({
  mapping: [
    {
      typeName: 'Query',
      pathConfig: ['users', 'results'],
      newFieldName: 'usersResults',
    },
  ],
})

type Query {
  users(limit: Int!, page: Int): UserSearchResult # Keep this
+ usersResults(limit: Int!, page: Int): [User!]! # Add a new one
}

scalar _HoistConfig

type UserSearchResult {
  page: Int!
}

type User {
  id: ID!
  name: String!
}

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Apollo Federation Subgraph Compatibility Results

Federation 1 Support	Federation 2 Support
_service 🟢 @key (single) 🟢 @key (multi) 🟢 @key (composite) 🟢 repeatable @key 🟢 @requires 🟢 @provides 🟢 federated tracing 🟢	@link 🟢 @shareable 🟢 @tag 🟢 @override 🟢 @inaccessible 🟢 @composeDirective 🟢 @interfaceObject 🟢

Learn more:

• Apollo Federation Subgraph Specification
• Compatibility Tests

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[enan69500]

We still have a problem with this config :
{ typeName: "PointOfSale", pathConfig: ["location", "latitude"], newFieldName: "latitude", },

Not on schema generator but on the hive runtime :

[ardatan]

Make sure you have updated both. Otherwise, could you create a new issue with a reproduction?

[enan69500]

This bug is with Prefix ... so new issue. Thanks
#7687