Backport of [API Gateway] Validate listener name is not empty into release/1.15.x#16341

hc-github-team-consul-core merged 2 commits intorelease/1.15.xhashicorp/consul:release/1.15.xfrom

backport/api-gateway-listener-name-validation/instantly-smooth-loonhashicorp/consul:backport/api-gateway-listener-name-validation/instantly-smooth-loonCopy head branch name to clipboard