For Rocky Linux 9, Kayobe will now disable STP on a bridge by default,
to preserve compatibility with network scripts, as Network Manager
enables STP on all bridges by default.
Enabling STP can lead to port down event if BPDU guard is enabled
on the switch.

Closes-Bug: #2028775

Change-Id: I35eaa92f4243af00697306aa801e5a733885ce4f