Add okhttp4-gson codegen to support OkHttp 4.12.0

[gatisahu]

In current okhttp4-gson codegen is using OkHttp 4.10.0 which has cve .Is there any workaround to use OkHttp 4.12.0

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3635

Swagger-codegen version

Swagger declaration file content or url

Command line used for generation

Steps to reproduce

Related issues/PRs

Suggest a fix/enhancement

[salami738]

bump