Print error messages in monitor/pubsub when errors occurs (#10050)

In monitor/pubsub mode, if the server closes the connection,
for example, use `CLIENT KILL`, redis-cli will exit directly
without printing any error messages.

This commit ensures that redis-cli will try to print the
error messages before exiting. Also there is a minor cleanup
for restart, see the example below.

before:
```
127.0.0.1:6379> monitor
OK
[root@ redis]#

127.0.0.1:6379> subscribe channel
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "channel"
3) (integer) 1
[root@ redis]#

127.0.0.1:6379> restart
127.0.0.1:6379> get keyUse 'restart' only in Lua debugging mode.
(nil)
```

after:
```
127.0.0.1:6379> monitor
OK
Error: Server closed the connection
[root@ redis]#

127.0.0.1:6379> subscribe channel
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "channel"
3) (integer) 1
Error: Server closed the connection
[root@ redis]#

127.0.0.1:6379> restart
Use 'restart' only in Lua debugging mode.
```

0 files changed, 0 insertions, 0 deletions