Changes to List External Batch Providers

the oneOf[#/components/schemas/InvalidApiKeyError]/allOf[#/components/schemas/ErrorResponse]/errors/items/instance response's property format changed from uri to uri-reference for status 401

the oneOf[#/components/schemas/MissingAuthenticationError]/allOf[#/components/schemas/ErrorResponse]/errors/items/instance response's property format changed from uri to uri-reference for status 401

endpoint added