`purview` - add API to configure `kafkaConfigurations`

Hi team,

The API to configure the Kafka configuration (with Event Hub) seems missing, would you be able to take a look and add it? Please let me know if I'm missing anything.

API url I captured from Azure Portal to configure the Kafka configuration: `https://management.azure.com/subscriptions/***/resourceGroups/***/providers/Microsoft.Purview/accounts/yicma2/kafkaConfigurations?api-version=2021-12-01`
However it's missing in this repo. even the api version is not there under https://github.com/Azure/azure-rest-api-specs/tree/main/specification/purview/resource-manager/Microsoft.Purview

Ref:
document: https://learn.microsoft.com/azure/purview/configure-event-hubs-for-kafka#configure-event-hubs-to-publish-messages-to-microsoft-purview

Start in specification/purview/resource-manager/Microsoft.Purview and compare the existing Purview API definitions with the documented kafkaConfigurations endpoint and linked Event Hubs guidance. Confirm the missing API version and determine the request and response shapes from the available Azure documentation; done means the Kafka configuration operation is represented in the Purview REST specification.

Written by the indexing model from the issue text.