[BUG] Description Invalid code generated in Java for oneof on types than end up with generics

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• 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

Invalid code generation for oneof in Java.

openapi-generator version

v7.16.0

OpenAPI declaration file content or url

          "someField": {
            "oneOf": [
              {
                "type": "array",
                "items": {
                  "type": "string"
                },
              },
              {
                "type": "string",
                "enum": [
                  "*"
                ],
              }
            ]
          },

Generation Details

Will generate the following invalid code

public List<String> getList<String>() throws ClassCastException {
   ...
}

The name of the method should be just getList and not getList<String>

Suggest a fix

The signature of the generated code should be

public List<String> getList() throws ClassCastException {
   ...
}

Start by reproducing the issue with the provided oneOf declaration using OpenAPI Generator v7.16.0, then trace the Java generation path that derives the getter name for the array/string alternatives. Done means the generated signature uses getList() while retaining List as its return type, without invalid generic text in the method name.