[Interchange] Bone name space are replace with underscore, legacy fbx rename with dash

This bug is critical since it can broke bone name reference between [animations, physics asset, curves, ...] and skeletal mesh bone name

Import the attach fbx file with interchange

Turn off interchange fbx in the cmd

Reimport with dialog the skeletal mesh

Result: A conflict skeleton and a broken physic asset if we change the skeleton. This happen in the reverse order legacy fbx ->reimport by interchange.