operator: Point to local operator helm chart

As the #675 changed the
set up of the operator installation the helm repository was missing. The disable
helm controllers test case depends on official helm repository index existence.
From that point the kuttle v2 end to end test suite start to fail. In this
change the test case will use local operator helm chart definition.

Reference
9c9aa06#diff-25902a4a01139dc3d8d70d5086b8cdb53d4b68b46185b3a5dc37c8585e801181L16-L18

Author: RafalKorepta

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

@@ -3,7 +3,7 @@ kind: TestStep
 commands:
   - command: 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}"
+        ../../../chart --set rbac.createAdditionalControllerCRs=true --set additionalCmdFlags="{--additional-controllers=all,--enable-helm-controllers=false}"
         --set rbac.createRPKBundleCRs=true --wait
 assert:
   - 00-assert-disable-helm-controllers.yaml

operator/tests/e2e-v2/disable-helm-controllers/04-enable-helm-controllers.yaml

@@ -4,7 +4,7 @@ commands:
   - script: kubectl kustomize ../../../config/crd | kubectl apply --server-side -f -
   - command: 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=true}"
+      ../../../chart --set rbac.createAdditionalControllerCRs=true --set additionalCmdFlags="{--additional-controllers=all,--enable-helm-controllers=true}"
       --set rbac.createRPKBundleCRs=true
 assert:
   - 04-assert-enable-helm-controllers.yaml