[BUG] default value not used for query parameters

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

Default value of not required query parameter not used. Maybe there is an other way to do what I want?

openapi-generator version

openapi-generator-maven-plugin 5.1.1

OpenAPI declaration file content or url

"parameters": {
    "version": {
        "name": "version",
        "in": "query",
        "required": false,
        "schema": {
            "type": "string",
            "default": "1.0.0"
        }
    }
}

Generation Details

Generation for typescript-angular with ngVersion to 11 and spec validation to true.

What are generated:

public myFunction(version?: string, observe: any = 'body', reportProgress: boolean = false, options?: { httpHeaderAccept?: 'application/json' }): Observable<any> {}

What is expected:

public myFunction(version?: string = '1.0.0', observe: any = 'body', reportProgress: boolean = false, options?: { httpHeaderAccept?: 'application/json' }): Observable<any> {}

Steps to reproduce

In the OpenAPI specification file créate a query parameter that is not required and with a default value.
Generate the code for typescript-angular with ng version to 11 and validation spec to true

Related issues/PRs

Suggest a fix

Reproduce the issue with the shown OpenAPI parameter and the typescript-angular generator using ngVersion 11 and spec validation enabled. Trace how the generator handles optional query parameters with schema defaults, then verify that the generated myFunction signature uses '1.0.0' and that relevant generator tests pass.