Bump Prometheus container images to v3

Author: MoteHue

etc/kayobe/kolla-image-tags.yml

@@ -13,3 +13,6 @@ kolla_image_tags:
   ovn_sb_db_relay:
     rocky-9: master-rocky-9-20250305T111730
     ubuntu-noble: master-ubuntu-noble-20250305T111730
+  prometheus:
+    rocky-9: master-rocky-9-20250430T112026
+    ubuntu-noble: master-ubuntu-noble-20250430T11202