v3.7.1
*: switch to new protobuf struct
docs: mirror_maker, rm readOnly, add uni-directional
etcdctl: organize etcdctl subcommand & delete template
Replace FORBIDDEN_DEPENDENCIES with gomodguard
Fix LICENSE file
Automate labels for etcdctl & etcdutl pull requests.
Remove etcd diagnostic tool
client: rename "master" branch references to "main"
version: bump up to 3.7.1
deps: bump google.golang.org/grpc to 1.82.1
fix: enable gosimple linter