samples: websocket_client: Run only when netif is enabled

Add depends_on: netif to prevent running on boards that
do not have netif enabled

Signed-off-by: Mahesh Mahadevan <[email protected]>

Author: mmahadevan108

samples/net/sockets/websocket_client/sample.yaml

@@ -1,6 +1,7 @@
 common:
   tags: net http http_client websocket_client websocket
   min_ram: 35
+  depends_on: netif
 sample:
   description: Websocket client sample
   name: websocket_client