Test limactl copy

The copy command seems to be tests only in one case, copying file from vm to host. The command support many other untested operations.

Tests:

- [x] copy single file from vm to host
- https://github.com/lima-vm/lima/blob/e911564e4a5f3151a3beef5ec2446914e016c745/hack/test-templates.sh#L197
- [ ] copy single file from host to vm
- [ ] copy directory from vm to host
- [ ] copy single file from vm to host
- [ ] copy directory from vm to host with --recursive flag
- [ ] copy directory from host to vm with --recursive flag
- [ ] copy multiple sources from vm to host
- [ ] copy multiple sources from host to vm
- [ ] copy multiple sources from vm to host with --recursive flag
- [ ] copy multiple sources from host to vm with --recursive flag

I'm not sure that adding these test-template.sh is the best way, it is very hard to work with such a big test.

I think we need to use go test running limactl with test vms created before the test.