Description of problem:

Metrics for egress router is removed in 4.21, same test pass in 4.20.

Version-Release number of selected component (if applicable):

 4.21.0-0.nightly-2025-12-18-020818

How reproducible:

Always

Steps to Reproduce:

Failed in QE CI job

Actual results:

Miss: network_attachment_definition_instances{networks="egress-router"}

Expected results:

network_attachment_definition_instances{networks="egress-router"}

Additional info:

1. 4.20.0 (WORKING) - Has 20 lines
   network_attachment_definition_instances{networks="any"} 0
   + network_attachment_definition_instances{networks="egress-router"} 0  ← THIS LINE
   network_attachment_definition_instances{networks="ib-sriov"} 0
   network_attachment_definition_instances{networks="sriov"} 0

1. 4.21.0 (BROKEN) - Has 19 lines  
   network_attachment_definition_instances{networks="any"} 0

• ← MISSING!
  network_attachment_definition_instances{networks="ib-sriov"} 0
  network_attachment_definition_instances{networks="sriov"} 0