Change instance types to support arm architectue (#6220)

Author: hgreebe

tests/integration-tests/tests/scaling/test_scaling/test_job_level_scaling/pcluster.config.yaml

@@ -18,21 +18,21 @@ Scheduling:
       ComputeResources:
         - Name: compute-resource-0
           Instances:
-            - InstanceType: t3.xlarge
+            - InstanceType: {{ instance }}
         - Name: compute-resource-1
           Instances:
-            - InstanceType: m5.xlarge
+            - InstanceType: {{ instance }}
       Networking:
         SubnetIds:
           - {{ private_subnet_id }}
     - Name: queue-jls-1-partial
       ComputeResources:
         - Name: compute-resource-0
           Instances:
-            - InstanceType: t3.xlarge
+            - InstanceType: {{ instance }}
         - Name: ice-cr-multiple
           Instances:
-            - InstanceType: m5.xlarge
+            - InstanceType: {{ instance }}
       Networking:
         SubnetIds:
           - {{ private_subnet_id }}