[BUG][TypeScript] Angular Client results in TS4115 missing override

[BjarneRentz]

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

The last change introduced a new BaseService that gets inherited. The derived services do not override the constructor parameters as seen in the error message:

 error TS4115: This parameter property must have an 'override' modifier because it overrides a member in base class 'BaseService'.

    34     constructor(protected httpClient: HttpClient, @Optional() @Inject(BASE_PATH) basePath: string|string[], @Optional() configuration?: Configuration)

openapi-generator version

We used the latest docker image

OpenAPI declaration file content or url

openapi: 3.0.0
info:
  title: OpenAPI Petstore
  description: This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters. For OAuth2 flow, you may use `user` as both username and password when asked to login.
  license:
    name: Apache-2.0
    url: http://www.apache.org/licenses/LICENSE-2.0.html
  version: 1.0.0
externalDocs:
  description: Find out more about OpenAPI generator
  url: https://openapi-generator.tech
tags:
- name: pet
  description: Everything about your Pets
- name: store
  description: Access to Petstore orders
- name: user
  description: Operations about user
paths:
  /pet:
    get:
      tags:
      - pet
      summary: Get a Pet
      operationId: getPet
      responses:
        404:
          description: Pet not found
        405:
          description: Validation exception

Generation Details

docker run openapitools/openapi-generator-cli:latest generate -i openapi.yaml -g typescript-angular with the project related volume bindings

Steps to reproduce

1. Generate a client for angular in typescript
2. Try to compile the project

Related issues/PRs

#20681

Suggest a fix

I did not look into all the details but probably adding the missing override attribute in the template will fix this.

[macjohnny]

@daniel-sc can you fix this?

[jeremytrips]

I believe this could be easily fixed by just updating the mustache files of the api.service.mustache and api.base.service.mustache. @macjohnny I can open pr if needed?

Edit:
I have the same problem on my solution so I investigated a bit.

[macjohnny]

yes please file a PR

[jeremytrips]

@macjohnny it is a first for me, I hope I have done everything right. Do not hesitate to give me feedbacks id needed.
The pr is waiting for approval in here #20736