Add clustalo as aligner to fasta_newick_epang_gappa swf

[erikrikarddaniel]

PR checklist

Closes #XXX

• 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
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  • 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

This adds clustalo, in profile mode, as aligner to the subworkflow in addition to hmmalign and mafft.

[SPPearce]

Haven't looked properly, but can you not use it implicitly in the map/filter's - the new language server will warn about that.