Provide functionality to hide unsupported features in the UI via global settings

### The required feature described as a wish

The required feature described as a wish

Currently, when using LINSTOR as Primary Storage, the Instance Snapshot feature with the Snapshot Memory option enabled unsupported.
```
(test) Failed to create Instance Snapshot: [VMSnapshot {"id":8,"name":"i-2-9-VM_VS_20260602081543","uuid":"ac744bb8-c11c-44f1-a197-0a34f07ff782","vmId":9}] due to: Creating Instance Snapshot: i-2-9-VM_VS_20260602081543 failed due to Create Instance Snapshot failed due to org.libvirt.LibvirtException: unsupported configuration: internal snapshot for disk vda unsupported for storage type raw
```
It would be useful to have the ability to disable or hide unsupported features in the UI via global settings. This would help prevent user confusion and avoid unnecessary errors.