Make it easier to get to ccloud page to generate Flink Region API keys

[jlrobins]

Wouldn't it be nice if you could context click on either a Flinkable Kafka Cluster or a Compute Pool in the resources tree and be invited to 'Generate Flink Region API Key'?

https://confluent.cloud/environments/${env_id}/add-flink-api-key?cloud=${cloud.toUpper()}&description=&name=&region=${region}&scope=user&service-account-desc=&service-account-name=&step=0