Run-all.ps1 cannot run 2.5M point GMM

[msdmkats]

All our 2.5M points GMM benchmark expect to work in the "replicate point" mode, where all points have the same coordinates, stated in the input file only once. All of our benchmark runners support this mode, but require a command line argument to be passed to them to activate it.

Currently, run-all.ps1 can not do that.

[awf]

I think we should remove replicate point mode. We should perhaps even just use random points, with a given seed.