Use nextflow to distribute Jenkins CI over Sherlock nodes

[thalassemia]

This allows us to test that the workflow pipeline (runscripts/workflow.py) works properly on Sherlock and means we can keep the resource requirements of the long-running Jenkins job to a minimum. One core should be enough to git pull the latest changes, set up the environment, and launch the Nextflow orchestrator which will submit ParCa/sim/analysis jobs to the cluster.

[github-actions]

Package	Line Rate	Complexity	Health
.	31%	0	❌
analysis	100%	0	✔
analysis.antibiotics_colony	11%	0	❌
analysis.antibiotics_colony.subgen_gene_plots	20%	0	❌
analysis.causality_network	18%	0	❌
analysis.colony	11%	0	❌
analysis.multidaughter	100%	0	✔
analysis.multiexperiment	100%	0	✔
analysis.multigeneration	23%	0	❌
analysis.multiseed	17%	0	❌
analysis.multivariant	17%	0	❌
analysis.single	15%	0	❌
composites	34%	0	❌
composites.ecoli_configs	90%	0	✔
composites.environment	26%	0	❌
debug	17%	0	❌
ecoli	9%	0	❌
ecoli.compendium	18%	0	❌
ecoli.dataclasses	31%	0	❌
ecoli.dataclasses.process	22%	0	❌
ecoli.dataclasses.state	32%	0	❌
ecoli.scripts	43%	0	❌
ecoli.scripts.fold_changes	15%	0	❌
ecoli.scripts.metabolism_kinetics	36%	0	❌
ecoli.scripts.metabolite_concentrations	26%	0	❌
ecoli.scripts.nca	10%	0	❌
ecoli.scripts.protein_half_lives	29%	0	❌
ecoli.scripts.rna_half_lives	21%	0	❌
experiments	36%	0	❌
io	52%	0	➖
library	48%	0	❌
library.cell_wall	14%	0	❌
processes	43%	0	❌
processes.antibiotics	27%	0	❌
processes.chemotaxis	14%	0	❌
processes.environment	29%	0	❌
processes.listeners	78%	0	✔
processes.membrane	27%	0	❌
processes.spatiality	19%	0	❌
processes.stubs	45%	0	❌
tests	22%	0	❌
tests.io	24%	0	❌
tests.utils	25%	0	❌
utils	28%	0	❌
utils._netflow	45%	0	❌
variants	36%	0	❌
Summary	28% (8438 / 29943)	0	❌