[Release-1.12] Enhance karmadactl operation and maintenance experience

[zhzhuang-zju]

What would you like to be added: We have completed the functionality alignment for the karmadactl command in release-1.11, for details, please refer to #5249.

The optimization of karmadactl is an ongoing effort, and recently, quite a few contributors have been involved in enhancing the capabilities of the karmadactl command. :wave::wave: To track the progress of optimizations related to karmadactl more efficiently, this issue will be used to collect the PRs for current karmadactl capability enhancements. Future optimizations for karmadactl will also be announced through this issue.

• [ ] karmadactl init supports deployment through configuration files（@tiansuo114 #5357）
• [ ] karmadactl support rebalance command to trigger a fresh rescheduling (@chaosi-zju #5471)
• [ ] add new command port-forward to forward one or more local ports to a pod (@zhzhuang-zju #5464)
• [ ] enable karmada-data flag in karmadactl register cmd (@mohamedawnallah #5429)
• [x] karmada init: support multiple label selection ability with flag EtcdNodeSelectorLabels. (@tiansuo114 #5321)
• [ ] add new command karmadactl config image list to list all required images from the specified private image registry (@tiansuo114 #5306)
• [x] Added 's' shorthand to operation-scope flags (@ahorine #5483)
• [x] karmadactl support shell autocompletion (@zhzhuang-zju #5533)
• [ ] karmadactl completion: support output shell completion code for fish shell
• [ ] karmadactl completion: support output shell completion code for powershell shell
• [ ] karmadactl unjoin: force unjoin member clusters with the flag --force (@zhzhuang-zju #4451)

[zhzhuang-zju]

/priority important-longterm