Depending on what order the subgraphs are processed in, it's
possible to hit a case where the parent sheet renames a bus
member before the bus neighbor renaming logic runs. In this
case, we don't want to apply the bus neighbor logic as it will
break connectivity to the parent sheet if that bus was not
also renamed (for example, if the hier ports only make net
connections and not bus connections)
Fixes https://gitlab.com/kicad/code/kicad/-/issues/6887
487aa37d2e