fix: Node subschema pattern

[ardatan]

When there is a Node subschema, and others to resolve the rest of the entities by using a union resolver as in Federation like below, it was failing. This version fixes that issue.

query {
  node(id: "1") {
    id # Fetches from Node
    ... on User {
      name # Fetches from User
    }
  }
}

type Query {
  node(id: ID!): Node
}

interface Node {
  id: ID!
}

type User implements Node {
  id: ID!
}

type Post implements Node {
  id: ID!
}

# User subschema
scalar _Any
type Query {
  _entities(representations: [_Any!]!): [_Entity]!
}
union _Entity = User
interface Node {
  id: ID!
}
type User implements Node {
  id: ID!
  name: String!
}

# Post subschema
scalar _Any
union _Entity = Post
type Query {
  _entities(representations: [_Any!]!): [_Entity]!
}
interface Node {
  id: ID!
}
type Post implements Node {
  id: ID!
  title: String!
}

[changeset-bot]

🦋 Changeset detected

Latest commit: 8faa65d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@graphql-tools/federation	Patch
@graphql-tools/delegate	Patch
@graphql-tools/stitch	Patch
federation-benchmark	Patch

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[github-actions]

🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@graphql-tools/delegate	10.0.9-alpha-20240502141744-8faa65d16da9b26fb043a60b4ce6431b74632e4e	npm ↗︎ unpkg ↗︎
@graphql-tools/federation	1.1.32-alpha-20240502141744-8faa65d16da9b26fb043a60b4ce6431b74632e4e	npm ↗︎ unpkg ↗︎
@graphql-tools/stitch	9.2.7-alpha-20240502141744-8faa65d16da9b26fb043a60b4ce6431b74632e4e	npm ↗︎ unpkg ↗︎

[github-actions]

✅ Benchmark Results

     ✓ no_errors
     ✓ expected_result

     checks.........................: 100.00% ✓ 334       ✗ 0  
     data_received..................: 39 MB   3.9 MB/s
     data_sent......................: 143 kB  14 kB/s
     http_req_blocked...............: avg=3.9µs    min=2.05µs   med=2.66µs   max=170.11µs p(90)=3.84µs  p(95)=4.11µs  
     http_req_connecting............: avg=692ns    min=0s       med=0s       max=115.56µs p(90)=0s      p(95)=0s      
     http_req_duration..............: avg=55.92ms  min=47.87ms  med=52.38ms  max=147.65ms p(90)=60.21ms p(95)=87.28ms 
       { expected_response:true }...: avg=55.92ms  min=47.87ms  med=52.38ms  max=147.65ms p(90)=60.21ms p(95)=87.28ms 
     http_req_failed................: 0.00%   ✓ 0         ✗ 167
     http_req_receiving.............: avg=129.12µs min=105.59µs med=125.99µs max=287.57µs p(90)=143.9µs p(95)=147.53µs
     http_req_sending...............: avg=24.9µs   min=19.19µs  med=24.7µs   max=70.89µs  p(90)=30.28µs p(95)=32.25µs 
     http_req_tls_handshaking.......: avg=0s       min=0s       med=0s       max=0s       p(90)=0s      p(95)=0s      
     http_req_waiting...............: avg=55.76ms  min=47.71ms  med=52.24ms  max=147.3ms  p(90)=60.08ms p(95)=87.11ms 
     http_reqs......................: 167     16.614998/s
     iteration_duration.............: avg=60.16ms  min=51.53ms  med=56.36ms  max=151.52ms p(90)=65.85ms p(95)=91.41ms 
     iterations.....................: 167     16.614998/s
     vus............................: 1       min=1       max=1
     vus_max........................: 1       min=1       max=1

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