Update export-to-cluster-logging-lokistack to detect storageclass (#3357)

Author: IshwarKanse

tests/e2e-openshift/export-to-cluster-logging-lokistack/chainsaw-test.yaml

@@ -20,6 +20,16 @@ spec:
         file: install-minio-assert.yaml
   - name: Create the LokiStack instance
     try:
+    - command:
+        entrypoint: oc
+        args:
+        - get
+        - storageclass
+        - -o
+        - jsonpath={.items[0].metadata.name}
+        outputs:
+        - name: STORAGE_CLASS_NAME
+          value: ($stdout)
     - apply:
         file: install-loki.yaml
     - assert:

tests/e2e-openshift/export-to-cluster-logging-lokistack/install-loki.yaml

@@ -12,6 +12,6 @@ spec:
     secret:
       name: logging-loki-s3 
       type: s3
-  storageClassName: gp2-csi
+  storageClassName: ($STORAGE_CLASS_NAME)
   tenants:
     mode: openshift-logging