Add status to issue create mutation

What does this MR do and why?

We need to add the argument to the legacy issue create mutation to support creating issues under board lists

References

Related to #550377 (closed)

How to set up and validate locally

1. Enable the work_item_status_feature_flag feature flag.
2. Optionally setup custom statuses: https://gitlab.com/gitlab-org/gitlab/-/snippets/4865066

Sample mutation

mutation {
  createIssue(input: {
    projectPath: "flightjs/flight",
    title: "My issue title",
    status: "gid://gitlab/WorkItems::Statuses::Custom::Status/2"
  }) {
    issue {
      id
      status {
        id
        name
      }
    }
  }
}

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