Randomized test sets from jrl-qp

[stephane-caron]

There are C++ problem generation routines in jrl-qp:

• https://github.com/jrl-umi3218/jrl-qp/blob/master/benchmarks/Solvers.cpp
• https://github.com/jrl-umi3218/jrl-qp/blob/master/include/jrl-qp/test/randomProblems.h

They could help improve the benchmark in qpsolvers.

[jcarpent]

You have complementary tools in ProxQP (https://github.com/Simple-Robotics/proxsuite/blob/a52c13cbe6286eebd2bc0157f7d901c3b5f681cf/include/proxsuite/proxqp/utils/random_qp_problems.hpp)