[BUG] [JAVA] when using schemaMapping for models in collections, not compilable code with @Valid is generated

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

My Spec defines a compenent like this:

MyResponse:
  required:
    - myResponses
  type: object
  properties:
    myResponses:
      uniqueItems: true
      type: array
      default: []
      items:
        $ref: '#/components/schemas/MyResponseItem'

This results in a java Declaration like this:

@Valid
private Set<@Valid MyResponseItem> myResponses;

So far so good.

I need to use schemaMapping for MyResponseItem, e.g.

MyResponseItem=com.mycompany.MyResponseItem

(as MyResponseItem class need to be manually provided)

Now the generator generates non-compilable code:

@Valid
private Set<@Valid com.mycompan.MyResponseItem> myResponses;

as java (at least java17) only expects simle typenames after @Valid

openapi-generator version

7.2.0. But also happens with 7.1.0

OpenAPI declaration file content or url

see above

Generation Details

Steps to reproduce

see above

Related issues/PRs

Suggest a fix

Start with the Java generation path using the MyResponse schema and the MyResponseItem schemaMapping described in the issue. Reproduce the generated collection declaration, then compile it with Java 17; done means schema-mapped collection element types are emitted in compilable code while retaining the needed validation annotations.