Switch to use YARP conda-forge binary package when generating conda packages

[traversaro]

As conda-forge/staged-recipes#18234 will hopefully be soon merged, we can finally fix #752 and #1094 .

In general, the changes are similar to #807 but for YARP.

[traversaro]

First test build: https://github.com/robotology/robotology-superbuild/actions/runs/2489359263 .
It should fail as conda-forge/staged-recipes#18234 is still not merged.

[traversaro]

First test build: https://github.com/robotology/robotology-superbuild/actions/runs/2489359263 . It should fail as conda-forge/staged-recipes#18234 is still not merged.

New build: https://github.com/robotology/robotology-superbuild/actions/runs/2489870178 . Now the yarp-cxx package should be available.

[traversaro]

Build now fails with:

CMake Error at /usr/share/miniconda/envs/test/conda-bld/gazebo-yarp-plugins_1655143803361/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pla/lib/cmake/YARP/YARPConfig.cmake:159 (find_package):
  Could not find a package configuration file provided by "YARP_cv" with any
  of the following names:
    YARP_cvConfig.cmake
    yarp_cv-config.cmake
  Add the installation prefix of "YARP_cv" to CMAKE_PREFIX_PATH or set
  "YARP_cv_DIR" to a directory containing one of the above files.  If
  "YARP_cv" provides a separate development package or SDK, be sure it has
  been installed.
Call Stack (most recent call first):
  CMakeLists.txt:49 (find_package)

So we probably need to conda-forge/yarp-feedstock#1 .

[traversaro]

So we probably need to conda-forge/yarp-feedstock#1 .

This was fixed. Merging so the migration is done in time for tonight generation.