LCORE-1724: temp - run provision-rhelai in parallel with cluster 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

@@ -92,7 +92,8 @@ spec:
       description: Provision a RHEL AI instance with vLLM auto-started.
       timeout: 2h
       runAfter:
-        - provision-cluster
+        # TODO: restore provision-cluster dependency
+        - get-aws-creds
         - get-aws-creds
       taskSpec:
         params: