Fix upgrade-e2e CI job (#1451)

The latest release v1.0.0-rc1 includes the change to the API:
OLM v1alpha1 APIs became v1 and this needs to be reflected
in the upgrade-e2e CI job.

Refs:
* #1228
* #1441

Signed-off-by: Mikalai Radchuk <mradchuk@redhat.com>

Author: m1kola

hack/test/pre-upgrade-setup.sh

@@ -127,7 +127,7 @@ roleRef:
 EOF
 
 kubectl apply -f - << EOF
-apiVersion: olm.operatorframework.io/v1alpha1
+apiVersion: olm.operatorframework.io/v1
 kind: ClusterExtension
 metadata:
   name: ${TEST_CLUSTER_EXTENSION_NAME}