[integ-tests] fix new_region.yaml by removing schedulers from test_update_slurm

Also verified `schedulers` does not exist in other yaml files

Signed-off-by: Hanwen <[email protected]>

Author: hanwen-cluster

tests/integration-tests/configs/new_region.yaml

@@ -62,7 +62,6 @@ test-suites:
         - regions: {{ NEW_REGION }}
           instances: {{ common.INSTANCES_DEFAULT_X86 }}
           oss: ["alinux2"]
-          schedulers: ["slurm"]
   monitoring:
     test_monitoring.py::test_monitoring:
       dimensions: