RecExCommon_topOptions: check if ByteStreamMetadataTool in MetadataTools

This MR adds a check whether ByteStreamMetadataTool is already in MetadataTools list before adding it.

I took the opportunity to do also some cleanup, following suggestions from @gemmeren :

• add ByteStreamMetadataTool to the ToolSvc always with adding it to MetaDataSvc.MetaDataTools
• make sure ByteStreamMetadata is propagated only through ESD and AOD

Fixes ATLASRECTS-6952