Debian: Fix system garbage-collect

On Debian docker registry has moved to /usr/bin/docker-registry.
Puppet calls a command with the CentOS path, resulting in error.

Updated a command in the platform::dockerdistribution::garbagecollect
class to point to correct registry path.

Test Plan:
Deployed the ISO with the change as AIO-SX and verified the
/var/log/puppet/latest/puppet.log file.

Closes-Bug: 1998183

Signed-off-by: Boovan Rajendran <boovan.rajendran@windriver.com>
Change-Id: If001e4294a8de0ff2eed0f4455fb0fe7acff1b6d

puppet-manifests/src/modules/platform/manifests/dockerdistribution.pp

@@ -267,6 +267,7 @@ class platform::dockerdistribution::garbagecollect {
   $runtime_config = '/etc/docker-distribution/registry/runtime_config.yml'
   $readonly_config = '/etc/docker-distribution/registry/readonly_config.yml'
   $used_config = '/etc/docker-distribution/registry/config.yml'
+  $registry_cmd = $::osfamily ? { 'Debian' => 'docker-registry', default => 'registry' }
 
   exec { 'turn registry read only':
     command => "ln -fs ${readonly_config} ${used_config}",
@@ -279,7 +280,7 @@ class platform::dockerdistribution::garbagecollect {
   }
 
   -> exec { 'run garbage collect':
-    command => "/usr/bin/registry garbage-collect ${used_config}",
+    command => "/usr/bin/${registry_cmd} garbage-collect ${used_config}",
   }
 
   -> exec { 'turn registry back to read write':