Add HOST_IP environment variable to consul_dataplane_sidecar.go

This environment variable must be set in order to utilize HOST_IP as part of statsd or dogstatsd sinks. If this variable is unset and the sink is configured to use HOST_IP, the sidecar won't start and pods won't coe up healthy.

control-plane/connect-inject/webhook/consul_dataplane_sidecar.go

@@ -139,6 +139,12 @@ func (w *MeshWebhook) consulDataplaneSidecar(namespace corev1.Namespace, pod cor
 					FieldRef: &corev1.ObjectFieldSelector{FieldPath: "metadata.uid"},
 				},
 			},
+			{
+				Name: "HOST_IP",
+				ValueFrom: &corev1.EnvVarSource{
+					FieldRef: &corev1.ObjectFieldSelector{FieldPath: "status.hostIP"},
+				},
+			},
 			{
 				Name:  "DP_CREDENTIAL_LOGIN_META",
 				Value: "pod=$(POD_NAMESPACE)/$(POD_NAME)",