Add support for DeviceManagement APIs under virtualEndpoint

[georgend]

Add virtualEndpoint to ModuleMapping.
Remove cmdlets that are not supported.
Added Cmdlets

Source	Name
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpoint
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointAuditEvent
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointCloudPC
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointDeviceImage
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointOnPremisesConnection
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointProvisioningPolicy
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointProvisioningPolicyAssignment
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointUserSetting
Microsoft.Graph.DeviceManagement.Administration	Get-MgDeviceManagementVirtualEndpointUserSettingAssignment
Microsoft.Graph.DeviceManagement.Administration	New-MgDeviceManagementVirtualEndpointDeviceImage
Microsoft.Graph.DeviceManagement.Administration	New-MgDeviceManagementVirtualEndpointOnPremisesConnection
Microsoft.Graph.DeviceManagement.Administration	New-MgDeviceManagementVirtualEndpointProvisioningPolicy
Microsoft.Graph.DeviceManagement.Administration	New-MgDeviceManagementVirtualEndpointProvisioningPolicyAssignment
Microsoft.Graph.DeviceManagement.Administration	New-MgDeviceManagementVirtualEndpointUserSetting
Microsoft.Graph.DeviceManagement.Administration	New-MgDeviceManagementVirtualEndpointUserSettingAssignment
Microsoft.Graph.DeviceManagement.Administration	Remove-MgDeviceManagementVirtualEndpointDeviceImage
Microsoft.Graph.DeviceManagement.Administration	Remove-MgDeviceManagementVirtualEndpointOnPremisesConnection
Microsoft.Graph.DeviceManagement.Administration	Remove-MgDeviceManagementVirtualEndpointProvisioningPolicy
Microsoft.Graph.DeviceManagement.Administration	Remove-MgDeviceManagementVirtualEndpointProvisioningPolicyAssignment
Microsoft.Graph.DeviceManagement.Administration	Remove-MgDeviceManagementVirtualEndpointUserSetting
Microsoft.Graph.DeviceManagement.Administration	Remove-MgDeviceManagementVirtualEndpointUserSettingAssignment
Microsoft.Graph.DeviceManagement.Administration	Update-MgDeviceManagementVirtualEndpointDeviceImage
Microsoft.Graph.DeviceManagement.Administration	Update-MgDeviceManagementVirtualEndpointOnPremisesConnection
Microsoft.Graph.DeviceManagement.Administration	Update-MgDeviceManagementVirtualEndpointProvisioningPolicy
Microsoft.Graph.DeviceManagement.Administration	Update-MgDeviceManagementVirtualEndpointProvisioningPolicyAssignment
Microsoft.Graph.DeviceManagement.Administration	Update-MgDeviceManagementVirtualEndpointUserSetting
Microsoft.Graph.DeviceManagement.Administration	Update-MgDeviceManagementVirtualEndpointUserSettingAssignment