[torchx][CI] Run k8s integration test on linux.24_04.4x since the *.16x variant timesout due to scarce resources

Author: Kiuk Chung

.github/workflows/kubernetes-minikube-integration-test.yaml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   kubernetes-launch:
-    runs-on: linux.24_04.16x
+    runs-on: linux.24_04.4x
     permissions:
       id-token: write
       contents: read