Add full name for observatories

[dlakaplan]

• Adds a separate .fullname attribute for observatories.
• Observatories in observatories.json all have actual names now.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (01a5ac0) 68.47% compared to head (bd29643) 68.47%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1668      +/-   ##
==========================================
- Coverage   68.47%   68.47%   -0.01%     
==========================================
  Files         104      104              
  Lines       24287    24289       +2     
  Branches     4336     4336              
==========================================
+ Hits        16630    16631       +1     
- Misses       6571     6572       +1     
  Partials     1086     1086              

Files	Coverage Δ
src/pint/observatory/__init__.py	81.65% <100.00%> (+0.05%)	⬆️
src/pint/observatory/topo_obs.py	82.63% <0.00%> (-0.50%)	⬇️

... and 2 files with indirect coverage changes

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[dlakaplan]

Identified some broken observatory positions #1669

[dlakaplan]

See formatted results at https://nanograv-pint--1668.org.readthedocs.build/en/1668/observatory_list.html

[abhisrkckl]

I'll merge this if this is ready.

[dlakaplan]

I think it's ready