selftests/bpf: Fix memory leak caused by not destroying skeleton
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v6.0.16 by commit 70028a10b6f50b917ac2da84478f706deb4fb066, it was introduced in version v5.19 by commit 0ef6740e97777bbe04aeacd32239ccb1732098d7. For more details please see the references link.