text: Title: [UX] GPU name not canonicalized when launch on kubernetes
  Body: When a kubernetes cluster have GPU: `GH200-480GB`
  ```
  sky show-gpus
  Kubernetes GPUs 
  GPU          REQUESTABLE_QTY_PER_NODE  TOTAL_GPUS  TOTAL_FREE_GPUS  
  GH200-480GB  1                         2           2                
  ```
  
  None of the following succeed:
  1. `sky launch --gpus gh200 --cloud kubernetes`
  2. `sky launch --gpus gh200-480gb --cloud kubernetes`
  
  
  Only working one:
  `sky launch --gpus GH200-480GB --cloud kubernetes`
  
  We should make the two listed above work