[Feature request]: Add option to disable known generating object with known keys for Enums

[NorthernLightsDevel]

Is your feature request related to a specific problem? Or an existing feature?

#2825 added a feature that allowed a dictionary of enum values to generate object keys from a Dictionary instead of treating it like a map. This breaks when generating an API client in newer versions of the library, with Flags enums, and when I actualy want the object to be a map in generated libraries.

Describe the solution you'd like

In add check to to suppress generating enum values for flags-enums, and a parameter to suppress passing keys to the DataContract for Dictionaries whith Enum keys, and add a command line option swashbuckle.aspnetcore.cli to be able to disable when generating the swagger file from a dll etc.

Additional context

No response

[martincostello]

It seems reasonable at a glance to have an option to control this behaviour when the OpenAPI document is generated, but I don't think we'd also want a dedicated CLI option as that's just more maintenance overhead in an area of the codebase that's more difficult to test.

Once there's a more concrete proposal we can agree on to move forward, someone from the community is welcome to pick this up and create a pull request for review.