Make LAPIS query of covSPECTRUM optional

[ktmeaton]

Infrequently, the pipeline may exit due to network issues connecting to covSPECTRUM. This mainly happens when multiple builds are running simultaneously, and using the API at the same time.

LAPIS queries can be disabled by setting the lapis parameter to false under sc2rf_recombinants in your profile's builds.yaml. The fields parent_lineages_* and cov-spectrum_* will be left as NA. For example:

builds:

    - name: tutorial
      metadata: data/tutorial/metadata.tsv
      sequences: data/tutorial/sequences.fasta

      sc2rf_recombinants:
          lapis: false