api: Add service_account field for k8s Pod

Fixes: #3118

Signed-off-by: Tam Mach <[email protected]>

Author: sayboras

api/v1/README.md

@@ -63,6 +63,8 @@ message Pod {
   string workload_kind = 7;
   // Contains all the annotations of the pod.
   map<string, string> pod_annotations = 8;
+  // Service account of the Pod.
+  string service_account = 9;
 }
 
 message Capabilities {

api/v1/tetragon/codegen/eventchecker/eventchecker.pb.go

@@ -118,6 +118,7 @@ func getPodInfo(
 				Privileged: isPrivileged,
 			},
 		},
+		ServiceAccount: pod.Spec.ServiceAccountName,
 	}
 	if option.Config.EnablePodAnnotations {
 		podInfo.PodAnnotations = pod.Annotations