MOR-929 Add wireguard-go, improve the kernel module check, do not try to run our own binaries

Peter Pentchevrequested to merge
mor-929-wireguard into main

Allow users to choose the user-space WireGuard implementation. Use modprobe to check whether we can use the wireguard kernel module. Do not even try to execute our own WireGuard binaries, we do not ship them.

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