Add busco downloads as output

[dialvarezs]

This PR

• Adds downloaded BUSCO lineages as an output.
• Updates BUSCO version in busco/generateplot

PR checklist

• This comment contains a description of changes (with reason).
• If you've fixed a bug or added code that should be tested, add tests!
• If you've added a new tool - have you followed the module conventions in the contribution docs
• If necessary, include test data in your PR.
• Remove all TODO statements.
• Emit the versions.yml file.
• Follow the naming conventions.
• Follow the parameters requirements.
• Follow the input/output options guidelines.
• Add a resource label
• Use BioConda and BioContainers if possible to fulfil software requirements.
• Ensure that the test works with either Docker / Singularity. Conda CI tests can be quite flaky:
  • For modules:
    • nf-core modules test <MODULE> --profile docker
    • nf-core modules test <MODULE> --profile singularity
    • nf-core modules test <MODULE> --profile conda
  • For subworkflows:
    • nf-core subworkflows test <SUBWORKFLOW> --profile docker
    • nf-core subworkflows test <SUBWORKFLOW> --profile singularity
    • nf-core subworkflows test <SUBWORKFLOW> --profile conda

[famosab]

Is there a way to assert a bit more than empty?

[famosab]

Seems like a lot of assertions just have empty results here in the snap.

[dialvarezs]

They come from the stub test, which only generates minimal outputs (nothing optional, and this process has plenty of them), and the snapshot includes the entire process output. I can adjust the snapshot to explicitly include only what was generated by the stub.

[dialvarezs]

Thank you for your review, I guess I addressed all the changes requested.