[BUG] [Generator] release v7.11.0 breaks referenced shema's properties

[JPPortier]

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 a schema's field is defined by using a $ref schema; referenced schema properties (e.g. description) are not added

openapi-generator version

• Working with .7.10.0 ✅
• Break with 7.11.0 🔴

OpenAPI declaration file content or url

openapi: 3.0.3
info:
  title: API Overview 
  version: "v1"
  description: description


paths:
  "/path":
    post:    
      operationId: post
      requestBody:
        $ref: '#/components/requestBodies/requestBody'      
      responses:
        "200":
          description: no response
          
components:
  requestBodies:
    requestBody:
      content: 
        application/json:
          schema:
            $ref: '#/components/schemas/requestSchema'
  schemas:
    requestSchema:    
      type: object
      properties:
        directField:
          type: string
          description: value field description from 'requestSchema' schema
        deferencedField:
          $ref: '#/components/schemas/deferencedSchema'

    deferencedSchema:
      type: object
      allOf:
        - $ref: '#/components/schemas/lowLevelSchema'
      description: Description from 'deferencedSchema' schema

    lowLevelSchema:
      type: string
      description: Description from 'lowLevelSchema' schema

Generation Details

• v7.10.0 generation
  Note the description content is correctly extracted from deferencedSchema within java comments :
  * Description from 'deferencedSchema' schema

  /**
   * Description from 'deferencedSchema' schema
   * @return deferencedField
   */
  @javax.annotation.Nullable
  @JsonProperty(JSON_PROPERTY_DEFERENCED_FIELD)
  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
  public String getDeferencedField() {
    return deferencedField;
  }

• v7.11.0 generation
  Note the description content no longer contains the description (defaulted to field name):
  * Get deferencedField

  /**
   * Get deferencedField
   * @return deferencedField
   */
  @javax.annotation.Nullable
  @JsonProperty(JSON_PROPERTY_DEFERENCED_FIELD)
  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
  public Object getDeferencedField() {
    return deferencedField;
  }

Steps to reproduce

java -jar openapi-generator-cli-7.11.0.jar generate -i /fooAllOfDescriptionAndRef.yaml -g java -o output --additional-properties=library=apache-httpclient

Related issues/PRs

• Issue appeared with this revert commit: 066a840

Suggest a fix

[wing328]

thanks for reporting the issue

please revert to v7.10.0 for the time being

i will try to come up with a better fix to cater both use cases