collectd: Mark unbuildable on rocky

Since Rocky 9.4 release - delivered libpqos is 5, not 4 - and
CentOS Stream 9 OpsTools packages have not been rebuilt.

Related-Bug: #2065362
Change-Id: Ic0929becd44f25a9fb8d6d789b8169f41c95a226

Author: mnasiadka

kolla/image/unbuildable.py

@@ -36,6 +36,7 @@
     },
 
     'rocky': {
+        "collectd",              # Missing libpqos.so.4()(64bit)
         "hacluster-pcs",         # Missing crmsh package
         "nova-spicehtml5proxy",  # Missing spicehtml5 package
         "ovsdpdk",               # Not supported on CentOS