Change OS for test_cluster_in_no_internet_subnet to DCV supported OS for all regions

Author: hgreebe

tests/integration-tests/configs/develop.yaml

@@ -365,11 +365,11 @@ test-suites:
           schedulers: ["slurm"]
         - regions: ["cn-north-1"]
           instances: {{ common.INSTANCES_DEFAULT_X86 }}
-          oss: [{{ OS_X86_5 }}]
+          oss: [{{ DCV_OS_X86_3 }}]
           schedulers: ["slurm"]
         - regions: ["us-gov-west-1"]
           instances: {{ common.INSTANCES_DEFAULT_X86 }}
-          oss: [{{ OS_X86_7 }}]
+          oss: [{{ DCV_OS_X86_4 }}]
           schedulers: ["slurm"]
     test_multi_cidr.py::test_multi_cidr:
       dimensions: