Support nlopt 2.9.0

[jslee02]

LD_LBFGS_NOCEDAL is removed in 2.9.0: stevengj/nlopt@f4e74eb

This should fix https://github.com/dartsim/dart/actions/runs/11768649754/job/32779651842

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Before creating a pull request

• Document new methods and classes
• Format new code files using ClangFormat by running make format
• Build with -DDART_TREAT_WARNINGS_AS_ERRORS=ON and resolve all the compile warnings

Before merging a pull request

• Set version target by selecting a milestone on the right side
• Summarize this change in CHANGELOG.md
• Add unit test(s) for this change
• Add Python bindings for new methods and classes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.55%. Comparing base (4b5b6a8) to head (a23190f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1874   +/-   ##
=======================================
  Coverage   61.55%   61.55%           
=======================================
  Files         490      490           
  Lines       46013    46013           
=======================================
  Hits        28325    28325           
  Misses      17688    17688           

Files with missing lines	Coverage Δ
dart/optimizer/nlopt/NloptSolver.cpp	25.47% <ø> (ø)
python/dartpy/optimizer/NloptSolver.cpp	87.50% <ø> (ø)