OA 3.1 foldable array types use the json editor instead of the array item picker

[tthornton3-chwy]

Q&A (please complete the following information)

• OS: ALL
• Browser: ALL
• Version: ALL
• Method of installation: ALL
• Swagger-UI version: Latest/5.32.8
• Swagger/OpenAPI version: Swagger 2 OpenAPI 3.1

Content & configuration

Example Swagger/OpenAPI definition:

{
  "name": "test",
  "in": "query",
  "description": "Find Something",
  "required": false,
  "allowEmptyValue": true,
  "schema": {
      "type": ["array", "null"],
      "items": {
        "type": "string",
                  "description": "Repo.",
                  "enum": [
                      "FOO",
                      "BAR"
                  ]
              }
         
      
  }
},

Describe the bug you're encountering

You would get the raw json editor when using the spec above. This should instead be the array item picker.

To reproduce...

Steps to reproduce the behavior:

1. Have an api-doc similar/including to what I shared above.
2. See that the json editor is shown instead of the array item picker.

Expected behavior

The array item picker should be shown.

Screenshots

What we want:

Additional context or thoughts

I fixed it here: #10942