fix: remove alternate identifier

[ManonMarchand]

Some alternate identifiers were related to similar datasets but not exactly equivalent ones in some VizieR entries.

With the evolution of the description of doi and bibcode, these identifiers have been moved into the section isRelatedTo and removed from alternateIdentifier in the CDS registry.

This change has been caught by pyVO's CI but is not a bug.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.30%. Comparing base (f765128) to head (3f84289).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #643   +/-   ##
=======================================
  Coverage   82.30%   82.30%           
=======================================
  Files          72       72           
  Lines        7430     7430           
=======================================
  Hits         6115     6115           
  Misses       1315     1315           

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[bsipocz]

Thanks Manon!