class RuboCop::Cop::Chef::Modernize::UseChefLanguageCloudHelpers

Chef Infra Client 15.5 and later include cloud helpers to make detecting instances that run on public and private clouds easier.

@example

### incorrect
node['cloud']['provider'] == 'alibaba'
node['cloud']['provider'] == 'ec2'
node['cloud']['provider'] == 'gce'
node['cloud']['provider'] == 'rackspace'
node['cloud']['provider'] == 'eucalyptus'
node['cloud']['provider'] == 'linode'
node['cloud']['provider'] == 'openstack'
node['cloud']['provider'] == 'azure'
node['cloud']['provider'] == 'digital_ocean'
node['cloud']['provider'] == 'softlayer'

### correct
alibaba?
ec2?
gce?
rackspace?
eucalyptus?
linode?
openstack?
azure?
digital_ocean?
softlayer?