[BUG] Swagger UI doesn't recognize file inputs when generating with jaxrs-jersey

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

Swagger UI doesn't recognize file inputs when using using the Maven plugin(openapi-generator-maven-plugin) with generator jaxrs-jersey.

This worked for version 4.3.0, but doesn't work for version 5.1.0 or 6.0.0-SNAPSHOT

I've used the latest version of Swagger UI.

openapi-generator version

5.1.0 (Worked on 4.3.0)

OpenAPI declaration file content or url

openapi: 3.0.3
info:
  title: File upload demo
  version: 1.0.0
servers:
  - url: http://localhost:9999/api
components:
  schemas:
    Dummy:
      type: object
      properties:
        key:
          type: string
        value:
          type: string
paths:
  /fileuploadMultiPart:
    post:
      description: Mulitpart file upload
      operationId: fileUploadMultipart
      requestBody:
        content:
          multipart/form-data:
            schema:
              type: object
              required:
                - definitionFile
              properties:
                definitionFile:
                  maxLength: 5000000
                  minLength: 1
                  type: string
                  description: Definition file
                  format: binary
        required: true
      responses:
        201:
          description: Multipart upload response
          content: { }

Generation Details

<plugin>
    <groupId>org.openapitools</groupId>
    <artifactId>openapi-generator-maven-plugin</artifactId>
    <version>${openapi-generator-maven-plugin.version}</version>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
                <inputSpec>${project.basedir}/src/main/resources/fileupload-demo.yaml</inputSpec>
                <generatorName>jaxrs-jersey</generatorName>
                <modelNameSuffix>DTO</modelNameSuffix>
                <modelPackage>com.mmab.soldr.api.swagger.model</modelPackage>
                <apiPackage>com.mmab.soldr.api.swagger</apiPackage>
                <invokerPackage>com.mmab.soldr.api.swagger</invokerPackage>
                <generateModels>true</generateModels>
                <configOptions>
                    <sourceFolder>src/main/java</sourceFolder>
                </configOptions>
            </configuration>
        </execution>
    </executions>
</plugin>

Steps to reproduce

I have made a repo to reproduce and demonstrate the problem:
https://github.com/Eskas/openapi-swagger-ui-fileupload-demo/

Related issues/PRs

Suggest a fix

Start with the supplied OpenAPI 3.0.3 declaration and Maven plugin configuration, or the linked reproduction repository, and generate jaxrs-jersey output with 5.1.0 or 6.0.0-SNAPSHOT. Compare the generated multipart endpoint and Swagger UI behavior with version 4.3.0; done means the definitionFile upload is recognized as it was in 4.3.0.