proxy/iptables: belatedly simplify local traffic policy metrics
proxy/iptables: belatedly simplify local traffic policy metrics

We figure out early on whether we're going to end up outputting no
endpoints, so update the metrics then.

(Also remove a redundant feature gate check; svcInfo already checks
the ServiceInternalTrafficPolicy feature gate itself and so
svcInfo.InternalPolicyLocal() will always return false if the gate is
not enabled.)

olivierlemasle/kubernetes,cblecker/kubernetes,enj/kubernetes,jessfraz/kubernetes,warmchang/kubernetes,warmchang/kubernetes,zhouhaibing089/kubernetes,carlory/kubernetes,kubernetes/kubernetes,GulajavaMinistudio/kubernetes,thockin/kubernetes,li-ang/kubernetes,mengqiy/kubernetes,zhouhaibing089/kubernetes,PiotrProkop/kubernetes,carlory/kubernetes,zhangmingld/kubernetes,MikeSpreitzer/kubernetes,deads2k/kubernetes,warmchang/kubernetes,kevin-wangzefeng/kubernetes,ravilr/kubernetes,BenTheElder/kubernetes,jackfrancis/kubernetes,ii/kubernetes,liggitt/kubernetes,ravilr/kubernetes,lojies/kubernetes,chestack/kubernetes,kevin-wangzefeng/kubernetes,zhangmingld/kubernetes,zhangmingld/kubernetes,openshift/kubernetes,ping035627/kubernetes,matthyx/kubernetes,zhouhaibing089/kubernetes,li-ang/kubernetes,shyamjvs/kubernetes,gnufied/kubernetes,jessfraz/kubernetes,mahak/kubernetes,jackfrancis/kubernetes,zhangmingld/kubernetes,ii/kubernetes,GulajavaMinistudio/kubernetes,k82cn/kubernetes,mahak/kubernetes,csrwng/kubernetes,chestack/kubernetes,MikeSpreitzer/kubernetes,li-ang/kubernetes,thockin/kubernetes,shyamjvs/kubernetes,zhangmingld/kubernetes,chestack/kubernetes,matthyx/kubernetes,k82cn/kubernetes,cblecker/kubernetes,lojies/kubernetes,mahak/kubernetes,mosoft521/kubernetes,enj/kubernetes,jackfrancis/kubernetes,csrwng/kubernetes,zhangmingld/kubernetes,li-ang/kubernetes,soltysh/kubernetes,openshift/kubernetes,soltysh/kubernetes,ravilr/kubernetes,tengqm/kubernetes,lojies/kubernetes,soltysh/kubernetes,deads2k/kubernetes,liggitt/kubernetes,gnufied/kubernetes,matthyx/kubernetes,mosoft521/kubernetes,iameli/kubernetes,ravilr/kubernetes,feiskyer/kubernetes,kubernetes/kubernetes,carlory/kubernetes,k82cn/kubernetes,dims/kubernetes,PiotrProkop/kubernetes,feiskyer/kubernetes,dixudx/kubernetes,jsafrane/kubernetes,kubernetes/kubernetes,iameli/kubernetes,ping035627/kubernetes,feiskyer/kubernetes,k82cn/kubernetes,ii/kubernetes,ii/kubernetes,GulajavaMinistudio/kubernetes,kevin-wangzefeng/kubernetes,li-ang/kubernetes,mengqiy/kubernetes,cblecker/kubernetes,jackfrancis/kubernetes,dims/kubernetes,dims/kubernetes,csrwng/kubernetes,bparees/kubernetes,thockin/kubernetes,matthyx/kubernetes,csrwng/kubernetes,BenTheElder/kubernetes,openshift/kubernetes,olivierlemasle/kubernetes,mengqiy/kubernetes,feiskyer/kubernetes,deads2k/kubernetes,gnufied/kubernetes,shyamjvs/kubernetes,thockin/kubernetes,MikeSpreitzer/kubernetes,mkumatag/kubernetes,ii/kubernetes,BenTheElder/kubernetes,gnufied/kubernetes,liggitt/kubernetes,ping035627/kubernetes,GulajavaMinistudio/kubernetes,jackfrancis/kubernetes,tengqm/kubernetes,soltysh/kubernetes,kevin-wangzefeng/kubernetes,thockin/kubernetes,enj/kubernetes,enj/kubernetes,mkumatag/kubernetes,deads2k/kubernetes,mahak/kubernetes,jsafrane/kubernetes,bparees/kubernetes,liggitt/kubernetes,BenTheElder/kubernetes,tengqm/kubernetes,dixudx/kubernetes,chestack/kubernetes,jessfraz/kubernetes,warmchang/kubernetes,csrwng/kubernetes,warmchang/kubernetes,bparees/kubernetes,dixudx/kubernetes,lojies/kubernetes,feiskyer/kubernetes,bparees/kubernetes,ping035627/kubernetes,openshift/kubernetes,jessfraz/kubernetes,carlory/kubernetes,gnufied/kubernetes,MikeSpreitzer/kubernetes,matthyx/kubernetes,deads2k/kubernetes,mosoft521/kubernetes,dixudx/kubernetes,mkumatag/kubernetes,zhouhaibing089/kubernetes,tengqm/kubernetes,ping035627/kubernetes,iameli/kubernetes,shyamjvs/kubernetes,enj/kubernetes,GulajavaMinistudio/kubernetes,mahak/kubernetes,PiotrProkop/kubernetes,shyamjvs/kubernetes,carlory/kubernetes,cblecker/kubernetes,ravilr/kubernetes,jsafrane/kubernetes,dims/kubernetes,mosoft521/kubernetes,olivierlemasle/kubernetes,mengqiy/kubernetes,chestack/kubernetes,kevin-wangzefeng/kubernetes,BenTheElder/kubernetes,k82cn/kubernetes,jsafrane/kubernetes,jessfraz/kubernetes,mkumatag/kubernetes,dims/kubernetes,iameli/kubernetes,soltysh/kubernetes,lojies/kubernetes,olivierlemasle/kubernetes,PiotrProkop/kubernetes,mengqiy/kubernetes,cblecker/kubernetes,mosoft521/kubernetes,zhouhaibing089/kubernetes,kubernetes/kubernetes,dixudx/kubernetes,liggitt/kubernetes,mkumatag/kubernetes,kubernetes/kubernetes,tengqm/kubernetes,olivierlemasle/kubernetes,openshift/kubernetes,jsafrane/kubernetes,MikeSpreitzer/kubernetes,iameli/kubernetes,PiotrProkop/kubernetes,bparees/kubernetes