Backport fixes from v25.09.0

[troglobit]

• Create v25.08.x branch
• Backport:
  • test: validate bootorder and version #1128
  • test: container-environment, unstable #1131
  • test: mdns-allow-deny unstable #1130
  • Show routes does not work in CLI #1150
  • CI: Do not start two build jobs when pushing a branch with label ci:main #1154
  • cli: 'show ospf' commands regression #1155
  • Expected neighbors not shown in sysrepocfg #1169
• Update ChangeLog
• Test
• Release