separate the sgc-cluster-workflow into component workflows

[ccbaumler]

I uploaded the workflow here https://github.com/dib-lab/portable-snakemake-workflows/blob/main/workflows/sgc-prep-cluster

To use this as a downloading workflow, change this line in the config to your metadata file containing a 'Run' column and this command to only run the fasterq-dump command:

snakemake -s sgc-prep-cluster --resources allowed_jobs=100 --profile slurm -R --until dump​

This should get you the files that you need.

Think I should break it down though as it got bigger than I had wanted. I am thinking of changing into three workflows:

1. get the fastq files
2. clean the fastq files
3. sgc commands

That way I can build off of each in interesting ways instead of needing to use the -R --until​ type system.