Backport of [API Gateway] Fix targeting service splitters in HTTPRoutes into release/1.15.x#16353

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

backport/api-gateway-splitter-fix/roughly-careful-ghosthashicorp/consul:backport/api-gateway-splitter-fix/roughly-careful-ghostCopy head branch name to clipboard