Add option to disable `[warning] getFabricPorts result false` notice

XPU Manager can be ran in an unprivileged (non-root user, all capabilities dropped) context for monitoring only while only losing xelink stats. This works great, except the xpumanager log is flooded with `[warning] getFabricPorts result false` messages. With this configuration everything is working as expected, so this output is just noise that can hide actual issues.

I'd like it if [this line](https://github.com/intel/xpumanager/blob/3cf742d99c732c829d756f450926b75ea48d3454/core/src/topology/topology.cpp#L454) could be conditionally disabled so that the log output is reduced when running `xpumd` in an unprivileged context.