ci: drop helm-e2e's wait on the deleted ActorTemplate CRD

helm-e2e waited for condition=Ready on the counter-microvm ActorTemplate
CRD after deploying the demo. The cutover to the substrate ActorTemplate
proto removed the CRD golden flow and then the CRD itself, so the wait
can never succeed. The demo deploy now creates the substrate template
and waits for its golden snapshot internally, so drop the separate wait
step and point the micro-VM test lane at the substrate fixtures with the
E2E_SANDBOX_CLASS knob pr-workflow already uses.

Author: keithmattix

.github/workflows/helm-e2e.yaml

@@ -86,6 +86,9 @@ jobs:
           --reuse-values \
           --wait --timeout=10m
     - name: Deploy micro-VM counter demo
+      # The deploy creates the substrate ActorTemplate and waits for its golden
+      # snapshot internally; the ActorTemplate CRD (and its Ready condition)
+      # no longer exists to wait on.
       run: hack/run-microvm-demo-kind.sh --skip-control-plane
     - name: Deploy gVisor counter demo
       run: hack/install-ate-kind.sh --deploy-demo-counter
@@ -95,9 +98,7 @@ jobs:
       run: hack/run-e2e-kind.sh -v -args --no-color
     - name: Run E2E tests (micro-VM)
       env:
-        E2E_TEMPLATE_NAMESPACE: ate-demo-counter-microvm
-        E2E_TEMPLATE_NAME: counter-microvm
-        E2E_TEMPLATE_READY_TIMEOUT: 600s
+        E2E_SANDBOX_CLASS: microvm
       run: hack/run-e2e-kind.sh ./internal/e2e/suites/demo -v -args --no-color
     - name: Dump diagnostics on failure
       if: failure()