Configurations for pillar sizes of 0.15, 0.3, 0.6

[ahmedius2]

Hi, thanks for making this wonderful work publicly available. I am trying to train Pillarnet on OpenPCDet with different pillar sizes. It is not clear to me how you detach subset of the backbone convolutions when increasing the pillar size. The number of output channels needs to be changed I guess. Could you please provide us config files for these pillar sizes or steps to reproduce their results on OpenPCDet?