Backport of docs: consistently name Consul service mesh into release/1.15.x#17227

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

backport/docs/clarify-connect-language-2/humbly-native-spanielhashicorp/consul:backport/docs/clarify-connect-language-2/humbly-native-spanielCopy head branch name to clipboard