qa: add windows run-tests.ps1

qa: add windows run-tests.ps1

We have a few Python rbd-wnbd tests that are invoked explicitly
by the ceph-build scripts [1].

There are a few issues with that:

* it's a separate repo that has to be updated whenever we add new
  tests
* new tests that reside in the ceph repo will not be executed by
  the PR check
* some tests may be missing in case of older branches

For this reason, we're adding a new script as part of the Ceph
repo that will take care of invoking the Windows rbd-wnbd tests.

The ceph-build script has already been updated accordingly [2].

[1] https://github.com/ceph/ceph-build/blob/main/scripts/ceph-windows/run_tests#L73-L80
[2] https://github.com/ceph/ceph-build/pull/2094

Signed-off-by: Lucian Petrut <lpetrut@cloudbasesolutions.com>
Co-Authored-By: Ionut Balutoiu <ibalutoiu@cloudbasesolutions.com>