disable syscall by default as it is a significant (#1742)

resource consuming

helm-chart/values.yaml

@@ -100,7 +100,12 @@ tap:
         operator: In
         values:
         - linux
-    dex: []
+    dex:
+    - matchExpressions:
+      - key: kubernetes.io/os
+        operator: In
+        values:
+        - linux
   tolerations:
     hub: []
     workers:
@@ -160,7 +165,6 @@ tap:
   - kafka
   - redis
   - sctp
-  - syscall
   - ws
   - ldap
   - radius