[concept] add livez/readyz for etcd#16008

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logicalhan wants to merge 5 commits intoetcd-io:mainfrom logicalhan:livez-readyz

+257-49

Commits on Jun 5, 2023

add livez/readyz for etcd
Han Kang
committed
refactor tests to basically use the same logic
Han Kang
committed
fix broken grpc handler
Han Kang
committed
Apply suggestions from code review

Han Kang
and
ahrtr
committed
gofmt file
Han Kang
committed