fix: Regression of outdated vfolder GQL resolver

[jopemachine]

When using vfolder GQL in the main branch, the following error occurs:

{
  "data": {
    "vfolder": null
  },
  "errors": [
    {
      "message": "VirtualFolder.batch_load_by_id() got an unexpected keyword argument 'user_uuid'",
      "locations": [
        {
          "line": 2,
          "column": 5
        }
      ],
      "path": [
        "vfolder"
      ]
    }
  ]
}

This PR resolves several issues causing the VFolder GQL to malfunction in the current main branch.

Request example

query ComputeContainer {
    vfolder (id: "VFOLDER_ID") {
        name
    }
}

Checklist: (if applicable)

• Milestone metadata specifying the target backport version

---

📚 Documentation preview 📚: https://sorna--3047.org.readthedocs.build/en/3047/

---

📚 Documentation preview 📚: https://sorna-ko--3047.org.readthedocs.build/ko/3047/

[jopemachine]

I want to use get_loader_by_func and VirtualFolder.batch_load_by_id here, but then I'm getting a type error since the return type of VirtualFolder.batch_load_by_id differs from what get_loader_by_func expects.

[jopemachine]

Since user_id is provided as a separate argument, the id here should be the vfolder's id.

[fregataa]

I think the news fragment has been sabotaged by gitub action.. please resolve it

[jopemachine]

I think the news fragment has been sabotaged by gitub action.. please resolve it

Resolved in #3059.

[fregataa]

Please update the PR title and the news fragment to "which GQL query resolver" is fixed. Broken Vfolder GQL is too vague

[fregataa]

Please refer which GQL query resolver is fixed. e.g. Fix GraphQL vfolder query.
VFolder GQL could mean many other queries such as vfolder, vfolder_list, vfolder_node etc

[jopemachine]

Please refer which GQL query resolver is fixed. e.g. Fix GraphQL vfolder query. VFolder GQL could mean many other queries such as vfolder, vfolder_list, vfolder_node etc

I used uppercase letters to maintain consistency with other PRs, but since it could cause misunderstandings, I changed it to lowercase.