LCORE-1724: temp - provision-rhelai in parallel for faster debugging

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: are-ces

.tekton/integration-tests/pipeline/lightspeed-stack-rhelai-test.yaml

@@ -44,9 +44,7 @@ spec:
     - name: provision-rhelai
       description: Provision a RHEL AI instance with vLLM auto-started.
       timeout: 2h
-      runAfter:
-        # TODO: restore provision-cluster dependency
-        - provision-cluster
+      # TODO: restore runAfter: provision-cluster
       taskSpec:
         params:
           - name: rhelai-version