[BUG][Qt][C++] List of referenced dictionary not generated with item data types

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When generating a model, member variables that are arrays of dictionaries are not generated properly when the map is defined as a reference. The map will be missing the key / value types.

openapi-generator version

5.1.1 (latest stable release)

OpenAPI declaration file content or url

In the following definitions, inlineMap generates the correct output while refMap generates the wrong one.

definitions:
  HashMap:
    type: object
    additionalProperties:
      type: string
  Test:
    type: "object"
    properties:
      inlineMap:
        type: array
        items:
          type: object
          additionalProperties:
            type: string
      refMap:
        type: array
        items:
          $ref: '#/definitions/HashMap'

Steps to reproduce

Just generate with the cpp-qt5-client generator

Related issues/PRs

N/A

Suggest a fix

N/A

Start by generating the cpp-qt5-client with the supplied OpenAPI definitions and compare the inlineMap and refMap output. Trace how referenced map schemas are resolved for array item types; done means the generated refMap includes the dictionary key and value types just as inlineMap does.