[FEATURE] Cluster information for a running VM

[vladimirpetrov]

Is your feature request related to a problem? Please describe.
There is no information on which cluster a VM is running on.

Describe the solution you'd like
Additional attribute can be added to the VM details page - cluster.

Describe alternatives you've considered
You can see the host in the VM details and clicking on it will reveal this information but still it's an extra click.

Additional context
None.

[yadvr]

@vladimirpetrov the listVirtualMachines and listVirtualMachinesMetrics api does not return clusterid or clustername; without backend changes the feature can't be implemented. Right now you can go to a host from a VM and from host view you can see cluster detail.

[ravening]

@rhtyd shall I create a pr for backend and frontend change to include the cluster name?