feat: add synthetic cluster dataset for testing similarity averaging
feat: add synthetic cluster dataset for testing similarity averaging

Summary: This Diff aims at adding a Cluster-SfM synthetic dataset to be able to test and experiment with the similarity averaging (aka. pose-graph)

Reviewed By: paulinus

Differential Revision: D27761576

fbshipit-source-id: 92464e6046bc18923b89c88fe5fa7e34b0646641

mapillary/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,oscarlorentzon/OpenSfM,oscarlorentzon/OpenSfM,oscarlorentzon/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM