Relax test to accept "no idle states"

The recent update of AL2023 totally disabled idle states, which could give even better performance.

ParallelCluster has been restricting idle state to maximum level 1 for performance reason.
ToDo: ParallelCluster should improve the configuration to totally disable idle state for all OS.

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

Author: hanwen-cluster

cookbooks/aws-parallelcluster-platform/test/controls/c_states_spec.rb

@@ -4,8 +4,8 @@
   only_if { !os_properties.on_docker? && os_properties.x86? }
   ## cpupower is installed for Ubuntu >=22
   describe bash('cpupower idle-info') do
-    its('stdout') { should match(/Number of idle states: 2/) }
-    its('stdout') { should match(/Available idle states: POLL C1/) }
+    its('stdout') { should match(/Number of idle states: 2|No idle states/) }
+    its('stdout') { should match(/Available idle states: POLL C1|No idle states/) }
   end
 end