ITS GPU tracking:

• Add sync/async/cosmics switching logic in its-tracker. Gpu-reco-wf can be instructed via configKeyVals. its-reco-wf stays the same, and they should not conflict even with configKeyVal passed.
• Fixed the double free into vertexertraitsGPU that made gpu-reco-wf to crash

ITS tracking:

• Developing a delta-rof approach also for seeding vertexer, porting it right after on GPU version