Retire puppet-murano: Retire Repository from the Governance Repository

Murano was marked inactive during this cycle and has been excluded from
2024.1 release. Because Puppet OpenStack modules are tightly coupled
with OpenStack's release cycle, we retire this module now and won't
create a 2024.1 release[1].

[1] https://lists.openstack.org/archives/list/openstack-discuss@lists.openstack.org/message/VHE6WWZKOTTKBLUVMABAAQKBN2QSEED4/

Depends-on: https://review.opendev.org/c/openstack/puppet-murano/+/913293
Change-Id: If6f672291b02ef14f7cfdd727aaa0902194d333d

reference/legacy.yaml

@@ -1970,6 +1970,10 @@ Puppet OpenStack:
       repos:
         - openstack/puppet-qdr
       retired-on: 2024-02-06
+    puppet-murano:
+      repos:
+        - openstack/puppet-murano
+      retired-on: 2024-03-15
 
 qinling:
   retired-on: 2020-11-27

reference/projects.yaml

@@ -2100,9 +2100,6 @@ Puppet OpenStack:
     puppet-mistral:
       repos:
         - openstack/puppet-mistral
-    puppet-murano:
-      repos:
-        - openstack/puppet-murano
     puppet-neutron:
       repos:
         - openstack/puppet-neutron