Update the tag for stx-kubevirt-app to v0.59.0.
This will update the initContainer image used by
the kubevirt-application. The container is
responsible for installing virtctl on the system
controller.
The version of the image corresponds to the
version of virtctl that is installed.
Task: 49202
Story: 2010931
Change-Id: Ifadb170946e7f118ceb2935bd3380d1a58952425
Signed-off-by: Gleb Aronsky <gleb.aronsky@windriver.com>