fix: use RfcAuthor in bibtex (w/titlepage_name)

[jennifer-richards]

Updates the bibtex template to work with RfcAuthor when present.

Uses titlepage_name instead of person.name and uses the current ordering, so e.g.,

    author =    {Eve Schooler and Jonathan Rosenberg and Henning Schulzrinne and Alan Johnston and Gonzalo Camarillo and Jon Peterson and Robert Sparks and Mark J. Handley},

becomes

    author =    {J. Rosenberg and H. Schulzrinne and G. Camarillo and A. Johnston and J. Peterson and R. Sparks and M. Handley and E. Schooler},

That change will affect all RFCs, not just the new ones. This should bring it into better agreement with the RFC index / RFCs themselves, so I think it's a feature.

Fixes #10944. Fixes #10948.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.52%. Comparing base (432aa3b) to head (1e1965e).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10947      +/-   ##
==========================================
+ Coverage   88.51%   88.52%   +0.01%     
==========================================
  Files         332      332              
  Lines       44970    44941      -29     
==========================================
- Hits        39805    39784      -21     
+ Misses       5165     5157       -8     

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