[BUG] [Java] Java Generator with library "native" generates code contains apache httpcomponents4 code for content-type application/x-www-form-urlencoded

Bug Report Checklist

• [ X] Have you provided a full/minimal spec to reproduce the issue?
• [ X] Have you validated the input using an OpenAPI validator?
• Have you tested with the latest master to confirm the issue still exists?
• [ X] Have you searched for related issues/PRs?
• [ X] What's the actual output vs expected output?

Description

Java client Generator with library "native" generates code which contains apache httpcomponents4 classes for content type "application/x-www-form-urlencoded"

openapi-generator version

7.16.0

OpenAPI declaration file content or url

openapi: 3.0.3
info:
  title: test
  version: 1.0.0
tags:
  - name: test
paths:
  /hello/world/{id}:
    post:
      parameters:
        - in: path
          name: id
          schema:
            type: string
          required: true
      operationId: helloWorld
      requestBody:
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/Body'
        required: true
      responses:
        '200':
          description: successfully
components:
  schemas:
    Body:
      type: object
      properties:
        hello:
          type: string
        world:
          type: string
      required: [ hello,world ]

Generation Details

language: java
library: native

Steps to reproduce

run cli command below, have a look at the generated class of org.openapitools.client.api.DefaultApi.java

openapi-generator-cli generate -g java --library native -i openapi.yaml -o generated-code

Suggest a fix

for the native-library, no older apache http4 code should be included which are generated by openapi java generator

Start by running the supplied openapi-generator-cli command with openapi.yaml and inspect generated-code, especially org.openapitools.client.api.DefaultApi.java. Trace how the Java generator handles application/x-www-form-urlencoded for the native library; done means the generated client no longer includes Apache HttpComponents 4 code for this case.