* feat: enhance service account key rotation with validation callback
- add validation callback will enable the host service to validate the newly created key before the deleting the old key
- wrapped both the call to validate permissions and validate callback in a retry because sometimes it takes some time for the newly created key to be active on GCP services. This throws an error and prevents host catalog creation
* fix: Cred rotation
- fix bug where the rotated service account key was not read. The response needs to be unmarshalled to pull out the values from th fields
- fix bug where the time stamp was not getting updated after rotating credentials
- fix bug where updates without setting a new secret fails
* feat: OnCreateCatalog
- Update onCreateCatalog to support credential rotation. Service authentication type creds will be rotated since we will have the credentials for the base service account without sufficient permissions.
- `onCreateCatalog` will also do a dry run validation to validate the credentials.
- The secrets and last rotated time will be returned
* feat: GCP authentication
Add authentication support for:
- authentication with service account key
- authentication with impersonating service account key
- authentication with application default credentials which are read from the environment
A HTTP client with a token set will be returned and used for authentication with all clients. for example
```
gcpClient, err := gcpConfig.GetClient(ctx)
if err != nil {
log.Fatalf("Failed to get client: %v", err)
}
client, err := computeCloud.NewInstancesRESTClient(ctx, option.WithHTTPClient(gcpClient))
if err != nil {
log.Fatalf("Failed to create client: %v", err)
}
```
Elim Tsiagbey
Elim Tsiagbey