[DONOTMERGE] Temporary change to unblock testing. Skip nvidia-fabricmanager start in B200

Author: gmarciani

cookbooks/aws-parallelcluster-platform/libraries/nvidia.rb

@@ -38,3 +38,7 @@ def get_device_ids
 def is_gb200_node?
   get_nvswitch_count(get_device_ids['gb200']) > 1
 end
+
+def is_b200_node?
+  get_nvswitch_count(get_device_ids['b200']) > 1
+end

cookbooks/aws-parallelcluster-platform/resources/fabric_manager/partial/_fabric_manager_common.rb

@@ -31,7 +31,7 @@
 
 action :configure do
   # Start nvidia fabric manager on NVSwitch enabled systems
-  if get_nvswitches > 1 && !is_gb200_node?
+  if get_nvswitches > 1 && !is_gb200_node? && !is_b200_node?
     service 'nvidia-fabricmanager' do
       action %i(start enable)
       supports status: true