When YaST proposes a bridge configuration for virtualization it also consider firmware configured interfaces as candidate ports which is wrong (related to https://github.com/yast/yast-network/pull/1319)
coverage: 80.598% (-0.007%) from 80.605%
when pulling 433991cc8fc9dcfcaddab385da488445f1631740 on bridge_skip_firmware_configured
into 2d0498fb9955e6b9be31b9f2a8f2a323365fb8ee on SLE-15-SP5.
Problem
When YaST proposes a bridge configuration for virtualization it also consider firmware configured interfaces as candidate ports which is wrong (related to https://github.com/yast/yast-network/pull/1319)
Solution
Do not consider firmware configured interfaces as bridgeable ones.