feat: update incus image host to run on incus (#309)

- remove zfs
- remove some sysctl values
- remove memlocks from limits
- install iptables, required for creating bridges

Reviewed-on: https://git.query.consul/unkinben/puppet-prod/pulls/309

modules/incus/manifests/init.pp

@@ -48,11 +48,10 @@ class incus (
     }
 
     exec { 'initiate_incus':
-      path        => ['/bin', '/usr/bin', '/sbin', '/usr/sbin'],
-      command     => 'cat /root/incus.preseed.yaml | incus admin init --preseed && touch /root/.incus_initialized',
-      refreshonly => true,
-      creates     => '/root/.incus_initialized',
-      subscribe   => File['/root/incus.preseed.yaml'],
+      path    => ['/bin', '/usr/bin', '/sbin', '/usr/sbin'],
+      command => 'cat /root/incus.preseed.yaml | incus admin init --preseed && touch /root/.incus_initialized',
+      creates => '/root/.incus_initialized',
+      require => File['/root/incus.preseed.yaml'],
     }
   }