CI path cleanup

[randaz81]

trafficstars

CI cleanup: removed build/bin from the PATH environment variable since it is no more needed after https://github.com/robotology/yarp/pull/2943

[update-docs[bot]]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would update the release notes by adding a file in doc/release/<target_branch>, based on your changes.

[randaz81]

There are still a bunch of tests that need to be fixed, i.e. FAILED: demo_yarp_idl_to_dir.exe demo_yarp_idl_to_dir_tests-73326a0.cmake D:/a/yarp/yarp/build/tests/yarpidl_thrift/demo/demo_yarp_idl_to_dir_tests-73326a0.cmake