os_router: fix checking if router needs update (#19780)
os_router: fix checking if router needs update (#19780)

When verifying if a router needs update, the os_router module should
take into account only network ports which are owned by routers. Other
ports might have been added e.g. by the HA network tenant, which would
lead the router to always be detected as changed and cause the module to
try removing these network interfaces.
thaim/ansible,thaim/ansible