ci: use ceph-csi-operator v0.6.0

The :latest container-image in the CI registry does not seem to be the
most recent version.

Signed-off-by: Niels de Vos <ndevos@ibm.com>

Author: nixpanic

build.env

@@ -17,11 +17,7 @@ CSI_IMAGE_VERSION=canary
 CSI_UPGRADE_VERSION=v3.16.2
 
 # ceph-csi-operator version used for e2e test
-# TODO: use release tag which includes the bug fixes
-# - https://github.com/ceph/ceph-csi-operator/pull/206
-# - https://github.com/ceph/ceph-csi-operator/pull/207
-# Till then use the latest tag instead of the release.
-CEPH_CSI_OPERATOR_VERSION=latest
+CEPH_CSI_OPERATOR_VERSION=v0.6.0
 
 # Ceph version to use
 BASE_IMAGE=quay.io/ceph/ceph:v20