fix: updated to v1 inferencepool in manifests (#1248)

* updated to v1 inferencepool

* leave kgateway to alpha inferencepool

* move istio to alpha inferencepool

Author: capri-xiyue

config/manifests/gateway/gke/healthcheck.yaml

@@ -5,7 +5,7 @@ metadata:
   namespace: default
 spec:
   targetRef:
-    group: "inference.networking.x-k8s.io"
+    group: "inference.networking.k8s.io"
     kind: InferencePool
     name: vllm-llama3-8b-instruct
   default:

config/manifests/gateway/gke/httproute.yaml

@@ -9,7 +9,7 @@ spec:
     name: inference-gateway
   rules:
   - backendRefs:
-    - group: inference.networking.x-k8s.io
+    - group: inference.networking.k8s.io
       kind: InferencePool
       name: vllm-llama3-8b-instruct
     matches: