Changes to POST /offers/:offer_id/switches/:switch_id/endsale

added the new trial enum value to the type response property for the response status 200

api operation id offers_offers_switches_endsale_postEndsaleSwitch removed and replaced with offers_offers_switches_endsale_postEndsaleSwitchDetail

added the new trial enum value to the request property type

added the optional property items to the response with the 200 status

endpoint added