Red Hat OpenStack from 16.2 to 17.1 fails during overcloud controller upgrade from RHEL 8 to RHEL 9: inplace upgrade fails at "Network configuration for unsupported device types detected"

Issue

• When performing the Red Hat OpenStack upgrade from 16.2 to 17.1 during an overcloud controller upgrade from RHEL8 to RHEL9, leapp reports one inhibitor as follow:

  | FATAL | run leapp upgrade (download packages) | overcloud-controller-0 | error={"changed": true, "cmd": "LEAPP_UNSUPPORTED=1 LEAPP_DEVEL_SKIP_CHECK_OS_RELEASE=1 LEAPP_NO_NETWORK_RENAMING=1 LEAPP_DEVEL_TARGET_RELEASE=9.2 leapp upgrade --enablerepo=rhel-9-for-x86_64-baseos-eus-rpms --enablerepo=rhel-9-for-x86_64-appstream-eus-rpms --enablerepo=rhel-9-for-x86_64-highavailability-eus-rpms --enablerepo=openstack-17.1-for-rhel-9-x86_64-rpms --enablerepo=fast-datapath-for-rhel-9-x86_64-rpms\n", "delta": "0:00:43.273583", "end": "2025-05-28 15:53:51.350247", "msg": "non-zero return code", "rc": 1, "start": "2025-05-28 15:53:08.076664", "stderr": "", "stderr_lines": [], "stdout": 
   "", "============================================================", "                     UPGRADE INHIBITED                      ", "============================================================", "", "Upgrade h
  as been inhibited due to the following problems:", "    1. Inhibitor: custom network-scripts detected", "Consult the pre-upgrade report for details and possible remediation.", "", "==============================
  ==============================", "                     UPGRADE INHIBITED                      ", "============================================================", "", "", "Debug output written to /var/log/leapp/le
  app-upgrade.log", "", "============================================================", "                           REPORT                           ", "============================================================
  ", "", "A report has been generated at /var/log/leapp/leapp-report.json", "A report has been generated at /var/log/leapp/leapp-report.txt",