ca: merge tests for SignCSR (#32583)
ca: merge tests for SignCSR (#32583)

Signed-off-by: Kailun Qin <0149305a169f8e13c8ed09a5bc4eb461ee5c4925@intel.com>
istio/istio,istio/istio,istio/istio,istio/istio,istio/istio