Add note for metrics not reported when using Airflow  KubernetesExecutor (#7788)
Add note for metrics not reported when using Airflow  KubernetesExecutor (#7788)

Co-authored-by: Sarina Bloodgood <533433c2d1e2f3fd3459b3c808840c669dde78c4@users.noreply.github.com>
DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core