[change] Prevent overlapping of clusters

[totallynotvaishnav]

When using clustering with clusteringAttribute, the clusters of different categories with the same location are overlapped. We should find a way to prevent this behavior.

[itsOmSarraf]

@nemesifier , I am working over this, found a fix by introducing a random offset between -0.00005 and 0.00005. It's a trade-off between preserving the exact original data and improving the visualization.

Here it is pull/239