Migrate qpOASES to conda-forge so that casadi conda binaries build qpOASES plugin

[traversaro]

For a long time we have kept the qpOASES binary package in our robotology channel ( https://anaconda.org/robotology/qpoases ), while waiting for qpOASES upstream to finally do a release (coin-or/qpOASES#113) so that we could bring qpOASES to conda-forge . However, I am afraid that a release upstrea is not going to happen soon, so probably it make sense to proceed and bring qpOASES to conda-forge .
This is important so that we can enable the qpOASES plugin in casadi package in conda-forge .

cc @FabioBergonti

[traversaro]

Related PRs:

• Add qpOASES recipe conda-forge/staged-recipes#18384
• qpOASES: Switch to use conda-forge conda packages instead of building custom one for robotology channel #1064

[traversaro]

Fixed by conda-forge/casadi-feedstock#74, even if in the end we just used the internal qpOASES of CasADi, see conda-forge/casadi-feedstock#77 .