Describe cluster doesn't take cluster name as parameter

[giuseppeporcelli]

Describe cluster doesn't take cluster name as parameter. This is an inconsistent behavior compared to how the other describe operations work (with the exception of cluster stack).

Examples:

% hyp describe hyp-pytorch-job
Usage: hyp describe hyp-pytorch-job [OPTIONS]
Try 'hyp describe hyp-pytorch-job --help' for help.

Error: Missing option '--job-name'.

% hyp describe hyp-custom-endpoint
Usage: hyp describe hyp-custom-endpoint [OPTIONS]
Try 'hyp describe hyp-custom-endpoint --help' for help.

Error: Missing option '--name'.

hyp describe hyp-jumpstart-endpoint
Usage: hyp describe hyp-jumpstart-endpoint [OPTIONS]
Try 'hyp describe hyp-jumpstart-endpoint --help' for help.

Error: Missing option '--name'.