tests/avocado: add hotplug_blk test

Introduce a test, that checks that plug/unplug of virtio-blk device
works.

(the test is developed by copying hotplug_cpu.py, so keep original
copyright)

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20240409065854.366856-1-vsementsov@yandex-team.ru>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed