nf-test: mOTUs - use clever setup block to download the database #699
Description
Description of feature
In our old ci.yml we had to use some custom bash scripts to download the hardcoded mOTUs database and generate the database.csv on the fly.
We need to replicate this with nf-test.
Fortunately @prototaxites already found out we CAN use setup blocks at a pipeline level:
As demonstrated here:
https://github.com/sanger-tol/metagenomeassembly/blob/main/tests/default.nf.test
So we should try and do something similar