Simplify etcd image release process#15605

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jmhbnz wants to merge 3 commits intoetcd-io:mainfrom jmhbnz:simplify-image-release

+229-77

Commits on Mar 31, 2023

Simplify etcd image release process.
jmhbnz
committed

Commits on Apr 1, 2023

Test image manifest to ensure all expected arch are present.
jmhbnz
committed

Commits on Apr 2, 2023

Refactor image tests with new docker_lib.sh
jmhbnz
committed