Fix github system test on Ubuntu22 and 24

Author: hanwen-cluster

cookbooks/aws-parallelcluster-environment/resources/cloudwatch/partial/_cloudwatch_install_package_debian.rb

@@ -1,7 +1,7 @@
 action :cloudwatch_install_package do
   dpkg_package package_path do
     source package_path
-  end
+  end unless on_docker?
 end
 
 action_class do

cookbooks/aws-parallelcluster-environment/test/controls/cloudwatch_spec.rb

@@ -36,7 +36,7 @@
   title "Check if cloudwatch package is installed"
   describe package('amazon-cloudwatch-agent') do
     it { should be_installed }
-  end
+  end unless os_properties.on_docker?
 end
 
 control 'tag:config_cloudwatch_configured' do