[Feature Request] Incorporate/generalize reference genomes

[xonq]

These workflow wrappers currently only reference Candidozyma auris B11205 (GCA_016772135).

• the WDL wrappers (task_mycosnp_variants.wdl and task_mycosnp_tree.wdl) are equipped with input variables that accommodate new organisms.
• /reference/ in the quay.io/theiagen/mycosnp container contains the reference accession, and may need to be populated with new reference fasta, bwa, masked assembly, etc. as required by mycosnp-nf; alternatively, reference data can be generalized to gather on the fly by downloading an assembly for a source accession/biosample
• task inputs need to be exposed to their associated workflows:

  String strain = "B11205"
  String accession = "GCA_016772135"

• further modification to reference sequences is necessary to accommodate other lineages