[BUG] typescript-rxjs generate types for fields with uniqueItems property as Sets

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

Schemas with fields which contain uniqueItems: true and type: "array" are typed as Sets, which is wrong, because there is no such conversion happening in the code.
Even though it would be the case, Set is converted to JSON as an empty object anyway, so does not fit particular use case.

openapi-generator version

OpenAPI declaration file content or url

openapi: 3.0.0
paths:
  /users:
    post:
      responses:
        '200':
          content:
            application/json:
              schema:
                uniqueItems: true
                type: array
                items:
                  type: string

Generation Details

openapi-generator generate -g typescript-rxjs -o test -i test.yaml

Steps to reproduce

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/issues/10770

Suggest a fix

Generate Arrays for uniqueItems: true fields, uniqueness of values in array will be checked on the server side or code anyway.

Start by running openapi-generator generate -g typescript-rxjs -o test -i test.yaml with the declaration shown in the issue and inspect the generated type for the array field. Trace the TypeScript RxJS generator's handling of uniqueItems: true; done means the field is generated as an Array rather than a Set, with the behavior covered by a regression check.