[CMake] depend on eigenpy only if we build the python interface

4 jobs for v3.2.3 in 5 minutes and 14 seconds
latest
Status Name Job ID Coverage
  Test
passed doc-coverage #7649

00:05:13

24.0%
passed robotpkg-sot-dynamic-pinocchio-v3-14.04-release #7646

00:03:28

passed robotpkg-sot-dynamic-pinocchio-v3-16.04-release #7647

00:03:37

passed robotpkg-sot-dynamic-pinocchio-v3-18.04-release #7648

00:04:46