CalloutType type 
Defines values for CalloutType. 
KnownCalloutType can be used interchangeably with CalloutType,
this enum contains the known values that the service supports.
Known values supported by the service
kusto 
sql 
cosmosdb 
external_data 
azure_digital_twins 
sandbox_artifacts 
webapi 
mysql 
postgresql 
genevametrics 
azure_openai
type CalloutType = string