[WIP] improve identifier & taxonomy parsing for lca index

[ctb]

As our sourmash_databases fu continues to evolve, we are doing a better job of providing versioned accessions on signature names, but this is also changing the requirements for taxonomy spreadsheets.

This PR provides a bunch of options to lca index to improve the UX and slightly improve the overall situation, while also highlighting how silly the current code and UX is :).

[codecov]

Codecov Report

Merging #1542 (7e822c6) into latest (516dc53) will increase coverage by 4.94%.
The diff coverage is 53.33%.

@@            Coverage Diff             @@
##           latest    #1542      +/-   ##
==========================================
+ Coverage   90.26%   95.21%   +4.94%     
==========================================
  Files         126       99      -27     
  Lines       21271    17584    -3687     
  Branches     1595     1600       +5     
==========================================
- Hits        19201    16743    -2458     
+ Misses       1843      611    -1232     
- Partials      227      230       +3     

Flag	Coverage Δ
python	95.21% <53.33%> (-0.04%)	⬇️
rust	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/sourmash/lca/command_index.py	88.44% <46.15%> (-3.05%)	⬇️
src/sourmash/cli/lca/index.py	100.00% <100.00%> (ø)
src/core/src/sketch/hyperloglog/mod.rs
src/core/src/index/sbt/mhbt.rs
src/core/src/ffi/mod.rs
src/core/src/index/sbt/mod.rs
src/core/src/ffi/utils.rs
src/core/src/ffi/hyperloglog.rs
src/core/tests/test.rs
src/core/src/ffi/cmd/compute.rs
... and 19 more

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[ctb]

Current command for building LCA indices 😆

sourmash lca index ../../gtdb-rs202.taxonomy.v2.csv gtdb-rs202.genomic.k31.lca.json.gz \
     gtdb-rs202.genomic-reps.k31.sbt.zip --scaled=10000 \
     --require-taxonomy --fail-on --split-identifier

[ctb]

This is working in practice, but still needs to be tested. @bluegenes if y'all end up taking this over for #1515 well that'd be just fine by me 😁

[bluegenes]

This is working in practice, but still needs to be tested. @bluegenes if y'all end up taking this over for #1515 well that'd be just fine by me 😁

can I merge this into #1543 and add tests over there? Or would it be best to add tests here and then integrate?

[ctb]

please go ahead!

[bluegenes]

Closing. Merged into #1543, with some tests added in b1a40a3