use g6 type instead of p4d

Author: demonCoder95

test/e2e/cluster_config.sh

@@ -131,7 +131,6 @@ clusters:
       taints: dedicated=node-tests:NoSchedule
   - discount_strategy: spot
     instance_types:
-    - "p4d.24xlarge"
     - "g3s.xlarge"
     - "g3.4xlarge"
     - "g4dn.xlarge"
@@ -142,6 +141,9 @@ clusters:
     - "g5.4xlarge"
     - "g5.8xlarge"
     - "g5.16xlarge"
+    - "g6.xlarge"
+    - "g6.2xlarge"
+    - "g6.4xlarge"
     name: worker-gpu
     profile: worker-splitaz
     min_size: 0