OpenApi custom polymorphic type names

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

We're looking into migrating from Swashbuckle to Microsoft.AspNetCore.OpenApi. There are many benefits but polymorphic type naming is a larger issue for us as it makes generated type names hard to read. In our case we use the base type name as a suffix, e.g.

```csharp
abstract class JobTemplate { ... }
class FooJobTemplate : JobTemplate { .. }
```

Generates a type called: `JobTemplateFooJobTemplate`.

### Describe the solution you'd like

Any way to customize the generated schema name. In Swashbuckle we could configure a delegate that took a Type and returned a String.

### Additional context

#57982 and #58213 also mention this particular issue.

Start by reviewing related issues #57982 and #58213 and the existing Swashbuckle configuration described in the report. The work is complete when Microsoft.AspNetCore.OpenApi provides a way to customize generated schema names, including polymorphic names such as FooJobTemplate without the JobTemplate prefix.

Written by the indexing model from the issue text.