text: Title: Log attempts to output resp.Body 
  Body: #### What happened:
  
  Log messages like `body of failing http response: &{0x531900 0xc0010d2780 0x775180}` are not very informative.
  
  /sig cloud-provider
  
  #### What you expected to happen:
  
  Either actual response body or none of it if this is a security concern.
  
  /sig security
  
  sig security to confirm it is ok to change this to log an actual response body.
  
  #### How to reproduce it (as minimally and precisely as possible):
  
  two places it is being logged:
  
  - https://github.com/kubernetes/kubernetes/blob/ea0764452222146c47ec826977f49d7001b0ea8c/staging/src/k8s.io/legacy-cloud-providers/gce/gcpcredential/credentialutil.go#L63
  - https://github.com/kubernetes/kubernetes/blob/ea0764452222146c47ec826977f49d7001b0ea8c/pkg/credentialprovider/config.go#L206
  
  #### Environment:
  - Kubernetes version (use `kubectl version`):1.20, but doesn't matter
  - Cloud provider or hardware configuration:GKE
  - OS (e.g: `cat /etc/os-release`):COS
  