vagrant: bump server VM image for net-next updates
vagrant: bump server VM image for net-next updates

This build contains latest bpf-next tree on track for 5.7 and contains:

- Socket LB helpers for cgroup programs
- BPF TPROXY helper for tc ingress
- 32bit subreg tracking, so we could potentially enable v3 CPU

Signed-off-by: Daniel Borkmann <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@iogearbox.net>

tgraf/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,cilium-team/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,cilium-team/cilium,tgraf/cilium,michi-covalent/cilium,tklauser/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium