[REQ] Make OpenApiNormalizer extensible #20994
Description
Is your feature request related to a problem? Please describe.
The current OpenApiNormalizer can not be extended. It is initialized in DefaultGenerator with a new OpenAPINormalizer(). So there is not way to override or extends the current implementation.
Customization is only available at the level of libraries or mustache templates.
Describe the solution you'd like
Add a configurable factory constructor to the default OpenapiNormalizer.
Change the private methods to protected methods.
Describe alternatives you've considered
Add the desired customization in the standard code base.