Terms of service and Privacy policy links are broken

[qmonnet]

The two links “Terms of service” and “Privacy policy”, in the page's footer, are broken. Content should probably be added for each.

[lizrice]

Wonder if we had some terms and privacy policy for cilium.io prior to its donation to CNCF? That might be a good starting point

[xmulligan]

Do we need a terms of service or a privacy policy or could we just remove them?

[borkmann]

(Wrt 'broken' links, some also still point to https://github.com/cilium/ebpf.io location.)