[Bug]: Creating or Updating advanced many-to-many relationship fails when more than one relation

[TobiasZimmermannDsb]

Expected behavior

Normal create and update objects with more than one advanced many-to-many relationship.

Actual behavior

Key "auto_id" passed for upsert not found in data

Steps to reproduce

Create a Car class with more than one advanced many-to-many relationship.
Run the GraphQL query

mutation {
  createCar(
    path: "/Product Data/Cars/vw/"
    key: "TestCar"
    defaultLanguage: "de"
    published: false
    type: "object"
    input: {
      carToCarRelation: [
        {
          type: "object"
          id: 232
          metadata: [{ name: "name", value: "green one" }]
        }
        {
          type: "object"
          id: 227
          metadata: [{ name: "name", value: "beige one" }]
        }
      ]
    }
  ) {
    success
    message
    output {
      id
    }
  }
}

result in error

{
  "data": {
    "createCar": {
      "success": false,
      "message": "Key \"`auto_id`\" passed for upsert not found in data",
      "output": {
        "id": null
      }
    }
  }
}

Same for updating existing Car with more than one advanced many-to-many relationship:

mutation {
  updateCar(
    id: 1167
    defaultLanguage: "de"
    input: {
      carToCarRelation: [
        {
          type: "object"
          id: 232
          metadata: [{ name: "name", value: "green one" }]
        }
        {
          type: "object"
          id: 227
          metadata: [{ name: "name", value: "beige one" }]
        }
      ]
    }
  ) {
    success
    message
    output {
      id
    }
  }
}

results in same error:

{
  "data": {
    "updateCar": {
      "success": false,
      "message": "Key \"`auto_id`\" passed for upsert not found in data",
      "output": {
        "id": null
      }
    }
  }
}

Probably relates to: #819

[TobiasZimmermannDsb]

I have checked the fix. Class

src/GraphQL/DataObjectInputProcessor/AdvancedManyToManyObjectRelation.php

probably also needs to be fixed with the same adjustments.
Can you please check it?