Change the warning message to debug message (#40021)
Change the warning message to debug message (#40021)

Fixes #40019

Signed-off-by: Tong Li <4118aabdcd930cab0c319bc1d83d7ae76ee12be9@us.ibm.com>
istio/istio,istio/istio,istio/istio,istio/istio,istio/istio