Description of problem:
When cloning a VM from a snapshot, if the snapshot indicated in 'snapshot_name' in the 'ovirt_vm' module doesn't exist, the task doesn't fail and the VM is cloned without disks.

IMO if the user is indicating snapshot_vm and snapshot_name, the task should fail if the snapshot is not found.

Version-Release number of selected component (if applicable):
ovirt-ansible-collection-1.6.6-1.el8ev.noarch

How reproducible:
Always

Steps to Reproduce:
1. Run some tasks like these to make a snapshot and clone a VM from it. I've intentionally used an incorrect snapshot_name to reproduce the issue:

~~~
      - name: Create {{ vm_name }} snapshot
        redhat.rhv.ovirt_snapshot:
          auth: "{{ ovirt_auth }}"
          vm_name: "{{ vm_name }}"
          description: "{{ vm_name }}_snap"
          use_memory: no
        register: snapshot

      - name: Clone VM from snapshot
        redhat.rhv.ovirt_vm:
          auth: "{{ ovirt_auth }}"
          snapshot_vm: "{{ vm_name }}"
          snapshot_name: "{{ vm_name }}_NON_EXISTING" # <----
          name: "{{ vm_name }}_backup"
          state: present
~~~

Actual results:
VM is cloned but without disks. No errors running the playbook.

Expected results:
A failure in the ovirt_vm task indicating that the snapshot doesn't exist.

Additional info: