KVM template mismatch when using UUID

[norrland]

When using a UUID as template name, the fix (6cbb0f0) to not cause a replace
doesn't work.

Investigate if the UUID can be used here as well.

ex:

resource "glesys_server" "foo" {
    platform = "KVM"
    template = "7d807e6c-b3db-4b1a-9a9a-d54653883eb7" # Debian 11
    cpu = 1
    memory = 512
    ...
}