CheckM2 module updates

[dialvarezs]

This PR introduces a few changes to the CheckM2 modules:

• Creates a copy of the main output of checkm2/predict to prevent clashing when gathering multiple of these files.
• Updates the test data to use a bacterial genome.
• Place groovy.json.JsonSlurper directly in checkm2/databasedownload to fix an error reported by the language server.

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

[dialvarezs]

Proof that test is passing with local Docker:
Is it possible to get a forced merge for this PR?

[SPPearce]

I was about to say that I don't have the power to force merge, but apparently I do now!

[dialvarezs]

Thanks!