[REQ][Kotlin-client] Support for authentication

Created by: armandmgt

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

The securitySchemes or securityDefinitions are not taken into account in the generated client.

Describe the solution you'd like

The code generator should support them as they are already supported in other languages (e.g. ruby-client)

Describe alternatives you've considered

I can workaround this by using a custom template but I feel like this should be supported in the generator