text: Title: [UX] `sky show-gpus` with an expired authentication of k8s shows long error message
  Body: <!-- Describe the bug report / feature request here -->
  
  
  `sky show-gpus`
  ```
  sky show-gpus
  ERROR:root:exec: process returned 1. F0109 21:40:59.931088   61835 cred.go:145] print credential failed with error: Failed to retrieve access token:: failure while executing gcloud, with args [config config-helper --format=json]: exit status 1 (err: ERROR: (gcloud.config.config-helper) There was a problem refreshing your current auth tokens: Reauthentication failed. cannot prompt during non-interactive execution.
  Please run:
  
    $ gcloud auth login
  
  to obtain new credentials.
  
  If you have already logged in with a different account, run:
  
    $ gcloud config set account ACCOUNT
  
  to select an already authenticated account to use.
  )
  COMMON_GPU  AVAILABLE_QUANTITIES  
  A10         1, 2, 4               
  A10G        1, 4, 8               
  A100        1, 2, 4, 8, 16        
  A100-80GB   1, 2, 4, 8            
  H100        1, 2, 4, 8, 12        
  L4          1, 2, 4, 8            
  L40S        1, 4, 8               
  P100        1, 2, 4               
  T4          1, 2, 4, 8            
  V100        1, 2, 4, 8            
  V100-32GB   1, 2, 4, 8            
  
  GOOGLE_TPU       AVAILABLE_QUANTITIES  
  tpu-v2-8         1                     
  tpu-v3-8         1                     
  tpu-v4-8         1                     
  tpu-v4-16        1                     
  tpu-v4-32        1                     
  tpu-v5litepod-1  1                     
  tpu-v5litepod-4  1                     
  tpu-v5litepod-8  1                     
  tpu-v5p-8        1                     
  tpu-v5p-16       1                     
  tpu-v5p-32       1                     
  tpu-v6e-1        1                     
  tpu-v6e-4        1                     
  tpu-v6e-8        1                     
  
  Hint: use -a/--all to see all accelerators (including non-common ones) and pricing.
  Note: No GPUs found in Kubernetes cluster. If your cluster contains GPUs, make sure nvidia.com/gpu resource is available on the nodes and the node labels for identifying GPUs (e.g., skypilot.co/accelerator) are setup correctly. To further debug, run: sky check 
  ```
  
  <!-- If relevant, fill in versioning info to help us troubleshoot -->
  _Version & Commit info:_
  * `sky -v`: PLEASE_FILL_IN
  * `sky -c`: PLEASE_FILL_IN
  