Move to igwn_ligolw

[spxiwh]

This is @GarethCabournDavies 's patch ... but hopefully it now works.

I also resolved deprecation warnings and removed mention of ligolw from debian stuff (I'm not too concerned about the debain stuff as long as it doesn't result in trying to install the old ligolw).

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 54.84%. Comparing base (de73773) to head (76bfa9c).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
sbank/psds.py	88.89%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #69      +/-   ##
==========================================
- Coverage   55.36%   54.84%   -0.51%     
==========================================
  Files          10        9       -1     
  Lines        1167     1167              
==========================================
- Hits          646      640       -6     
- Misses        521      527       +6     

Flag	Coverage Δ
Linux	54.84% <90.00%> (-0.51%)	⬇️
macOS	?
python3.10	?
python3.11	?
python3.8	?
python3.9	54.84% <90.00%> (-0.57%)	⬇️

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[spxiwh]

I think I fixed the translation issues, but in trying to persuade this to build using non-ancient versions of lalsuite I'm hitting a failure I don't understand.

[spxiwh]

@GarethCabournDavies This should be ready for review now.

[GarethCabournDavies]

I think this all looks good. A few comments, but mostly questions rather than anything holding up approval

[spxiwh]

Thanks @GarethCabournDavies I think I've resolved the comments now(?)

[GarethCabournDavies]

All resolved 👍