Add kube namespace to tls (TRA-4443) (#1013)

* add namespace to tls - initial commit
* add tls namespace to mizu entry

tap/api/api.go

@@ -18,6 +18,7 @@ import (
 )
 
 const mizuTestEnvVar = "MIZU_TEST"
+const UNKNOWN_NAMESPACE = ""
 
 var UnknownIp net.IP = net.IP{0, 0, 0, 0}
 var UnknownPort uint16 = 0
@@ -100,6 +101,7 @@ type OutputChannelItem struct {
 	ConnectionInfo *ConnectionInfo
 	Pair           *RequestResponsePair
 	Summary        *BaseEntry
+	Namespace      string
 }
 
 type SuperTimer struct {