lb: Add --all flag to delete-service and delete-rev-nat
lb: Add --all flag to delete-service and delete-rev-nat

Allows to delete all entries at once.

Acked-by: Andre Martins <bc9800b9d52a24cce72a73dd528afed53f10e5fc@cilium.io>
Signed-off-by: Thomas Graf <5f50a84c1fa3bcff146405017f36aec1a10a9e38@cilium.io>

scanf/cilium,gumpt/cilium,ivar-lazzaro/cilium,cilium/cilium,eloycoto/cilium,gumpt/cilium,ivar-lazzaro/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,eloycoto/cilium,cilium/cilium,eloycoto/cilium,cilium-team/cilium,mskarbek/cilium,eloycoto/cilium,tgraf/cilium,mskarbek/cilium,tgraf/cilium,scanf/cilium,michi-covalent/cilium,gumpt/cilium,ivar-lazzaro/cilium,tklauser/cilium,gumpt/cilium,cilium/cilium,eloycoto/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,michi-covalent/cilium,mskarbek/cilium,tklauser/cilium,gumpt/cilium,tklauser/cilium,scanf/cilium,mskarbek/cilium,tklauser/cilium,scanf/cilium,scanf/cilium,eloycoto/cilium,tgraf/cilium,ivar-lazzaro/cilium,scanf/cilium,mskarbek/cilium,eloycoto/cilium,gumpt/cilium,tgraf/cilium,cilium-team/cilium,tgraf/cilium,ivar-lazzaro/cilium,ivar-lazzaro/cilium,scanf/cilium,tgraf/cilium,mskarbek/cilium,gumpt/cilium