[BUG][All] Models are not generated if "type": object and "additionalProperties": false in OAS 2

Description

Models are not generated if "type": object "additionalProperties": false in OAS 2.
if "additionalProperties" is removed, the model will be generated correctly.
It occurs regardless of the generator.
The regression started since v7.0.0

openapi-generator version

latest - 7.4.0

OpenAPI declaration file content or url

{
   "swagger": "2.0",
   "info": {
      "title": "Test API",
      "version": "0.1"
   },
   "host": "http://test.local/api",
   "paths": {},
   "definitions": {
      "TimeSpanModel": {
         "type": "object",
         "additionalProperties": false,
         "required": [
            "totalMilliseconds"
         ],
         "properties": {
            "totalMilliseconds": {
               "type": "integer",
               "format": "int64"
            }
         }
      },
      "TimeSpanModelWithoutAdditionProperties": {
         "type": "object",
         "required": [
            "totalMilliseconds"
         ],
         "properties": {
            "totalMilliseconds": {
               "type": "integer",
               "format": "int64"
            }
         }
      },
      "OtherModel": {
         "type": "object",
         "properties": {
            "firstTimestamp": {
               "$ref": "#/definitions/TimeSpanModel"
            },
            "secondTimestamp": {
               "$ref": "#/definitions/TimeSpanModelWithoutAdditionProperties"
            }
         }
      }
   }
}

Generation Details

docker run --rm -v $PWD:/app openapitools/openapi-generator-cli generate -i /app/petstore.json -g typescript-axios -o /app/output

Steps to reproduce

Related issues/PRs

Not sure this PR is related but since it was added in 7.0.0 and contains many changes related to additionlProperties I assume it is related.
https://github.com/OpenAPITools/openapi-generator/pull/16227

Expected output vs Actual output

Actual:

/**
 * 
 * @export
 * @interface OtherModel
 */
export interface OtherModel {
    /**
     * 
     * @type {object}
     * @memberof OtherModel
     */
    'firstTimestamp'?: object;
    /**
     * 
     * @type {object}
     * @memberof OtherModel
     */
    'secondTimestamp'?: object;
    /**
     * 
     * @type {TimeSpanModelWithoutAdditionProperties}
     * @memberof OtherModel
     */
    'thirdTimestamp'?: TimeSpanModelWithoutAdditionProperties;
}
/**
 * 
 * @export
 * @interface TimeSpanModelWithoutAdditionProperties
 */
export interface TimeSpanModelWithoutAdditionProperties {
    /**
     * 
     * @type {number}
     * @memberof TimeSpanModelWithoutAdditionProperties
     */
    'totalMilliseconds': number;
}

Expected:

/**
 * 
 * @export
 * @interface OtherModel
 */
export interface OtherModel {
    /**
     * 
     * @type {TimeSpanModel}
     * @memberof OtherModel
     */
    'firstTimestamp'?: TimeSpanModel;
    /**
     * 
     * @type {TimeSpanModel}
     * @memberof OtherModel
     */
    'secondTimestamp'?: TimeSpanModel;
    /**
     * 
     * @type {TimeSpanModelWithoutAdditionProperties}
     * @memberof OtherModel
     */
    'thirdTimestamp'?: TimeSpanModelWithoutAdditionProperties;
}
/**
 * 
 * @export
 * @interface TimeSpanModel
 */
export interface TimeSpanModel {
    /**
     * 
     * @type {number}
     * @memberof TimeSpanModel
     */
    'totalMilliseconds': number;
}
/**
 * 
 * @export
 * @interface TimeSpanModelWithoutAdditionProperties
 */
export interface TimeSpanModelWithoutAdditionProperties {
    /**
     * 
     * @type {number}
     * @memberof TimeSpanModelWithoutAdditionProperties
     */
    'totalMilliseconds': number;
}

Reproduce the regression with the supplied OAS 2 declaration and the documented openapi-generator Docker command, comparing the generated typescript-axios output with the expected models. Start by tracing how definitions with additionalProperties: false are resolved, then add a regression test covering the declaration and verify that both referenced and standalone models are generated.