operator: Add missing redpanda helm chart repository in disable helm cotnrollers test case

Author: RafalKorepta

operator/tests/e2e-v2/disable-helm-controllers/00-disable-helm-controllers.yaml

@@ -1,7 +1,7 @@
 apiVersion: kuttl.dev/v1beta1
 kind: TestStep
 commands:
-  - command: helm upgrade --install --set logLevel=trace --set image.tag=dev
+  - command: helm repo add redpanda https://charts.redpanda.com && helm upgrade --install --set logLevel=trace --set image.tag=dev
         --set image.repository=localhost/redpanda-operator --namespace redpanda --create-namespace redpanda-operator
         redpanda/operator --set rbac.createAdditionalControllerCRs=true --set additionalCmdFlags="{--additional-controllers=all,--enable-helm-controllers=false}"
         --set rbac.createRPKBundleCRs=true --wait