[BUG][typescript-axios] for allOf construct containing $ref and anonymous inlined schema, inlined schema type is not being generated

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• 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

Constructs like

    ExampleResponse:
      allOf:
        - $ref: '#/components/schemas/ExampleResponseBase'
        - type: object
          properties:
            attribute1:
              type: string
            attribute2:
              type: string

where allOf contains $ref AND inlined anonymous object schema, openapi generator does not generate type for anonymous object schema, resulting in having only referenced $ref schema in resulting parent type:

export type ExampleResponse = ExampleResponseBase;

Version 5.4.0 seems to properly generate ExampleResponseAllOf containing inlined schema attributes resulting in proper

export type ExampleResponse = ExampleResponseAllOf & ExampleResponseBase;

openapi-generator version

7.14.0

OpenAPI declaration file content or url

input-openapi.yaml

Generation Details

Using openapitools.json

{
  "$schema": "node_modules/@openapitools/openapi-generator-cli/config.schema.json",
  "spaces": 2,
  "generator-cli": {
    "version": "7.14.0",
    "repository": {
      "downloadUrl": "https://nexus.app.slsp.sk/repository/public-slsp-maven-group/org/openapitools/openapi-generator-cli/7.14.0/openapi-generator-cli-7.14.0.jar"
    },
    "generators": {
      "example-api": {
        "generatorName": "typescript-axios",
        "output": "./generated",
        "glob": "./input-openapi.yaml",
        "additionalProperties": {
          "enumPropertyNaming": "original",
          "stringEnums": true,
          "supportsES6": "true",
          "withSeparateModelsAndApi": true,
          "modelPackage": "model",
          "apiPackage": "api"
        }
      }
    }
  }
}

Steps to reproduce

Run

npx openapi-generator-cli generate --generator-key example-api

(from folder where openapitools.json and input-openapi.yaml are)

Suggest a fix

Since it is valid schema, inlined anonymous object should have its own type generated.

Start with input-openapi.yaml and the generator configuration in openapitools.json, then run npx openapi-generator-cli generate --generator-key example-api. Inspect the typescript-axios generation path for the allOf case combining a $ref with an inline object. Done means the generated ExampleResponse includes a type for the inline attributes and combines it with ExampleResponseBase as expected.