Thanks for your question.
The only way to achieve this currently is either by using some third party image management solutions (for example, Nerdio, Citrix etc) or using either Ephemeral disks or a devOps pipeline that performs the rebuild for you (using automation to kick it off). We don't have a way to do this in portal as of today as a WVD function.
Please refer to this documentation on Ephemeral disks: https://learn.microsoft.com/en-us/azure/virtual-machines/ephemeral-os-disks
Furthermore, this works with domain joined VMs as well.
You may find this video helpful : WVD Stateless VMs | Windows Virtual Desktop #15
Hope that helps answer your question.