[BUG] nodejs-express-server generator does not generate models

Bug Report Checklist

• [ x] Have you provided a full/minimal spec to reproduce the issue?
• [x ] Have you validated the input using an OpenAPI validator (example)?
• [x ] Have you tested with the latest master to confirm the issue still exists?
• [ x] Have you searched for related issues/PRs?
• [x ] What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Cannot replicate the nodejs-express-server sample to generate models.

openapi-generator version

7.4.0

OpenAPI declaration file content or url

https://github.com/OpenAPITools/openapi-generator/blob/master/samples/server/petstore/nodejs-express-server/api/openapi.yaml

Generation Details

See below

Steps to reproduce

1. Clone this repo
2. Install the CLI tool npm install @openapitools/openapi-generator-cli
3. Navigate to samples/server/petstore/nodejs-express-server
4. Generate the code npx openapi-generator-cli generate -g nodejs-express-server -o output -i api/openapi.yaml

Expected Results
A directory output/models will be created matching the contents of https://github.com/OpenAPITools/openapi-generator/tree/master/samples/server/petstore/nodejs-express-server/models

Actual Results
No models directory is created. There are no warnings or errors in the log to indicate the models will not be generated.

Related issues/PRs

There was an issue created and then closed here: https://github.com/OpenAPITools/openapi-generator/issues/12274 but details were not included for their work around.

Suggest a fix

Start with samples/server/petstore/nodejs-express-server/api/openapi.yaml and run the documented npx openapi-generator-cli command for the nodejs-express-server generator. Compare the generated output with samples/server/petstore/nodejs-express-server/models; done means output/models is created with the expected model files and no warnings or errors are needed to explain the omission.