OpenAPI codegen is broken with wildcard in route params

[tpoisseau]

And parameters appear 2 times:

• Once in parameters with in: "path"
• Once in "params" with in: "query"

* in params schema object is not escaped into a string, so it's an invalid key for yaml. (* symbol is used for advanced yaml feature to repeat entries.)

NB: because * is string[] it expand String.prototype props in schema.

Because the yaml is broken, /docs endpoint do not load correctly (content is empty for scaler, swagger-ui display an error)

Repro: tpoisseau/tuyau-openapi-repro@574f522