LAST alignment statistics for MultiQC

[charles-plessy]

This PR adds a multiqc output channel to the last/train, last/lastal and last/split modules. The new channel provides statistics in TSV format.

For last/lastal the MultiQC file contains some of the alignment parameters determined by this module. Their value is quickly retrieved by parsing a text file.

For last/lastal and last/split, the MultiQC file contains the total alignment length and percent similarity computed on the fly while the alignment is being performed.

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

[itrujnara]

Looks fine. I have to trust you that it works, but the code is nice and clean.

[charles-plessy]

Yes it works !