libbpf: Avoid enum forward-declarations in public API in C++ mode
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 d6ea94068bb7f3b6707715c09acaf13bf9ff2540. For more details please see the references link.