[BUG][KOTLIN] kotlin-spring generator flag appendRequestToHandler generates broken code when used with flag delegatePattern

[hagis]

Bug Report Checklist

• [ ] Have you provided a full/minimal spec to reproduce the issue?
• [x] Have you validated the input using an OpenAPI validator (example)?
• [ ] 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?
• [ ] [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When generating Kotlin code with kotlin-spring generator using both the flags

• appendRequestToHandler
• delegatePattern

I get classess

1. xxApi
2. xxApiController
3. xxApiDelegate

• xxApiController seems fine. It extends xxApi.
• xxApi has a correct function signature with ServerHttpRequest as the last argument, but it calls the delegate without the ServerHttpRequest argument.
• xxApiDelegate does not compile, because it has a broken function signature. It has an additional nullable argument without a name, and type like this ": ?"

openapi-generator version

7.5.0

Related issues/PRs

Feature request for appendRequestToHandler: https://github.com/OpenAPITools/openapi-generator/pull/17158 PR: https://github.com/OpenAPITools/openapi-generator/pull/17158

Suggest a fix

Support for appendRequestToHandler was added in PR https://github.com/OpenAPITools/openapi-generator/pull/17158, and it shows no changes for apiDelegate.mustache. This leads to believe that the delegate pattern was not addressed when adding the appendRequestToHandler feature.