docs: Update iproute2 requirements
docs: Update iproute2 requirements

The commit addresses the following:

- "libbpf-static-data" branch must be used for loading > v1.10.
- OpenSUSE binaries no longer include Cilium's patches.

All relevant info is in the forked iproute2's README.md too, so just
refer to it for more info.

Signed-off-by: Martynas Pumputis <6b0d31c0d563223024da45691584643ac78c96e8@lambda.lt>

tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,cilium/cilium,cilium/cilium,cilium/cilium