samples: net: echo-client: Enable event mgmt info support

CONFIG_NET_MGMT_EVENT_INFO needs to be enabled for this sample so
that we can get detailed information when the event is generated.

Signed-off-by: Jukka Rissanen <[email protected]>

Author: jukkar

samples/net/sockets/echo_client/prj.conf

@@ -7,6 +7,7 @@ CONFIG_NET_IPV4=y
 CONFIG_NET_SOCKETS=y
 CONFIG_ZVFS_POLL_MAX=5
 CONFIG_NET_CONNECTION_MANAGER=y
+CONFIG_NET_MGMT_EVENT_INFO=y
 
 CONFIG_POSIX_API=y