endpoint: Do not fail to regenerate w/o L7 proxy
endpoint: Do not fail to regenerate w/o L7 proxy

It is expected that in some deployments the L7 proxy will be disabled.
Currently, it can be disabled when `--install-iptables-rules=false`
is set which can happen when e.g.  running in the ipvlan mode or
w/o netfilter/iptables.

To play nicely with such deployments, do not fail the endpoint
regeneration when the L7 proxy is disabled.

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

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