[BUG]kbcli cluster connect foxlake failed

[ahjing99]

kbcli version
Kubernetes: v1.27.3-gke.100
KubeBlocks: 0.8.0-beta.15
kbcli: 0.8.0-beta.15

  `kbcli addon enable foxlake `

addon.extensions.kubeblocks.io/foxlake enabled

 `kbcli cluster create  foxlake-moxlhh --termination-policy=Halt --monitoring-interval=0 --cluster-definition=foxlake --enable-all-logs=false --cluster-version=foxlake-0.2.0 --set cpu=500m,memory=1Gi,replicas=3,storage=20Gi  --namespace default `

Cluster foxlake-moxlhh created

 kbcli cluster connect foxlake-moxlhh
Connect to instance foxlake-moxlhh-foxlake-server-0: out of foxlake-moxlhh-foxlake-server-0, foxlake-moxlhh-foxlake-server-1, foxlake-moxlhh-foxlake-server-2
sh: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
error: parse "mysql://foxlake_root:xmcd624g@:${serverPort}": invalid port ":${serverPort}" after host
command terminated with exit code 1

[ahjing99]

fixed by #6080 (review)