Adjust sequencer webmaker to new number of columns

[morcuended]

Since several columns are removed (walltime, wobble and host), the number of columns in the sequencer table are reduced from 21 to 18.

[codecov]

Codecov Report

Merging #97 (6a0cd1f) into main (1599444) will decrease coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #97      +/-   ##
==========================================
- Coverage   81.92%   81.83%   -0.10%     
==========================================
  Files          43       43              
  Lines        4443     4443              
==========================================
- Hits         3640     3636       -4     
- Misses        803      807       +4     

Impacted Files	Coverage Δ
osa/utils/utils.py	67.28% <0.00%> (-1.41%)	⬇️
osa/utils/tests/test_utils.py	97.72% <0.00%> (-1.14%)	⬇️

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