Add new vSphere metrics metadata (#2643)
Add new vSphere metrics metadata (#2643)

* add level 1 metadata

* add level 2 metrics

* add cluster, datastore, datacenter metrics

DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core