ceph-windows: Add more Windows testing

ceph-windows: Add more Windows testing

Run `test_rbd_wnbd.py` script from the upstream Ceph QA Windows
workunit scripts as part of the `script/ceph-windows/run_tests`.

The new test cases don't take a lot of time to execute (unless
something is wrong with Ceph on Windows or Linux). So, we won't
have any noticeable jobs' execute time penalty.

This adds more Windows tests to the Jenkins jobs:
* `ceph-windows-test`
* `ceph-windows-pull-requests`

Signed-off-by: Ionut Balutoiu <ibalutoiu@cloudbasesolutions.com>