[BUG] [JAVA] OAS3 incorrect data type when providing a default value

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 providing a default value, UI is saying the value is a string when it's an integer. Example JSON shows the variable as the correct data type though.

openapi-generator version

5.3.1

OpenAPI declaration file content or url

        - name: page
          in: query
          description: Zero-based page index of results to return
          required: false
          schema:
            type: integer
            format: int32
            default: 100

Generation Details

Using OAS3 = true

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/pull/9775

Suggest a fix/enhancement

My guess is that the OAS3 changes for Java just aren't setting the type correctly in the mustache templates.

Reproduce the supplied OAS3 YAML with the Java generator and compare the UI's type for the default value with the generated JSON example. Then inspect the Java OAS3 Mustache templates suggested in the report and review related PR 9775; done means the UI identifies the integer default as an integer.