Linux kernel has the following policy:
* initial bridge MAC is random
* if the bridge MAC is not set explicitly by userspace,
bridge MAC is the smallest MAC address of all ports
But systemd-udevd which we use started to assign "stable" MACs to bridge
interfaces (when they are created), which Linux kernel treats as
userspace explicitly set, so the bridge no longer gets an automatic MAC
of the ports.
This is a breaking change, so we need to revert it.
Fixes#10884Fixes#11011
Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>