bpf: Fix up proxy debug monitor message for hairpin
bpf: Fix up proxy debug monitor message for hairpin

When hairpinning, it's useful to have two datapoints for the proxy
redirect: One in the original program and one in the program that
actually prepares the context to send the packet to the proxy. The
ctx_redirect_to_proxy_hairpin one should occur in the original program,
so change it to DBG_CAPTURE_PROXY_PRE. The corresponding
DBG_CAPTURE_PROXY_POST should be handled in the "to-host" program later.

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@cilium.io>

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