fix(plan): replace await with wait in add_inventory_hostnames

- Change await to wait for better compatibility and readability
- Ensure all tasks complete before proceeding with the plan

Author: CoMfUcIoS

spec/acceptance/peadm_spec/plans/add_inventory_hostnames.pp

@@ -4,7 +4,7 @@
   $t = get_targets('*')
   wait_until_available($t)
 
-  $fqdn_results = await(
+  $fqdn_results = wait(
     parallelize($t) |$target| {
       $fqdn = run_command('hostname -f', $target)
       $target.set_var('certname', $fqdn.first['stdout'].chomp)