Create VM Template fails when Template name has a space in it

### problem

When creating a VM Template from a Volume Snapshot, it fails if it has a space, such as:

If VM Name is: 'Zabbix Server', the template will fail to create.

If VM Name is: 'Zabbix-Server', the template will suceed and create normally.

### versions

NA

### The steps to reproduce the bug

Create a normal VM Template, either via the UI or API

### What to do about it?

Fix the space issue, or force API to only accept non-space text

Start by reproducing VM Template creation from a Volume Snapshot through both the UI and API, using a template name with a space and one with a hyphen. Trace the failing creation path and determine whether the API should accept spaces or reject them; done means the chosen behavior works consistently and is covered by verification for both name forms.

Written by the indexing model from the issue text.