qa: add basic Ceph on Windows integration test

qa: add basic Ceph on Windows integration test

Due to lack of Windows support in the Teuthology, the test case adopts
the following workaround:

* Deploy baremetal machine with `ubuntu_latest.yaml` and
  configure it with libvirt KVM.
* Create a libvirt VM and provision it with Windows Server 2019, using
  the official ISO from Microsoft.
* Configure SSH in the Windows VM, and run the tests remotely via SSH.

The implementation of the test case consists of workunit scripts.

`qa/workunits/windows/test_rbd_wnbd.py` is the main Python script
to test Ceph on Windows basic functionality. This is executed in the
libvirt VM configured with Windows Server 2019.

Co-authored-by: Lucian Petrut <lpetrut@cloudbasesolutions.com>
Co-authored-by: Daniel Vincze <dvincze@cloudbasesolutions.com>
Signed-off-by: Ionut Balutoiu <ibalutoiu@cloudbasesolutions.com>