[Feature]: support for runtime skip properties inside ModelConverter

Feature Description

It could be helpful to skip some properties documentation generation inside schemas based on API consuming context (e.g. specific user).

Use Case

The found solution seems to using OpenAPIConfiguration.getUserDefinedOptions(). That information is available inside io.swagger.v3.jaxrs2.Reader but not in ModelConverter.
ModelConverters are accessed through a singleton instance (ModelConverters.getInstance()), so it cannot be customized in a multithread environment where each thread is delegated to generate documentation for a specific user where schema has to be customized, because each thread doesn't have its own ModelConverter's configuration.

Suggested Solution (optional)

The OpenApiContext.setModelConverters(Set<ModelConverter>) seems to be usable to customize on the fly the ModelConverter for specific documentation generation.
But OpenApiContext.read() ignore that ModelConverter's configuration and nothing is being shared with OpenApiReader that continues using the singleton instance (ModelConverters.getInstance())).

Alternatives Considered

I haven't found any other alternatives.

Additional Context

Checklist

• I have searched the existing issues to ensure this is not a duplicate.
• This feature would be useful to more than just my use case.
• I have provided enough detail for the maintainers to understand the scope of the request.

Read io.swagger.v3.jaxrs2.Reader, OpenApiContext.read(), ModelConverters.getInstance(), and the ModelConverter configuration paths. Trace how OpenAPIConfiguration.getUserDefinedOptions() and OpenApiContext.setModelConverters() are handled during schema generation. Done means defining and implementing a thread-safe way to apply runtime, context-specific property skipping without relying on the singleton converter.