Remove iscsid from Pulp image list

We no longer require it since Ironic dropped the iscsi deploy driver.

Author: markgoddard

etc/kayobe/pulp.yml

@@ -523,8 +523,7 @@ stackhpc_pulp_images_kolla:
 # List of images for each base distribution which should not/cannot be built.
 stackhpc_kolla_unbuildable_images:
   ubuntu-jammy: []
-  rocky-9:
-    - iscsid
+  rocky-9: []
 
 # Whitespace-separated list of regular expressions matching Kolla image names.
 # Usage is similar to kolla-build CLI arguments.