Remove temporarily generated subfolders and files for tool `prep_sample`

[lindaxiang]

The lane bams which are temporarily generated for input BAM can not be removed by CLEANUP step, we need to add script to remove them once the fastq files have been generated.

[edsu7]

@lindaxiang could you provide an example?

A clean up step should've occured:
https://github.com/icgc-argo-workflows/argo-modules/blob/main/modules/icgc-argo-workflows/prep/sample/resources/usr/bin/main.py#L154-L159