[maven-release-plugin] copy for tag v21.0.1

[maven-release-plugin] copy for tag v21.0.0

[maven-release-plugin] copy for tag v21.0.0-legacy

[maven-release-plugin] copy for tag v20.0.1-legacy

[maven-release-plugin] copy for tag v19.0.1

[maven-release-plugin] copy for tag v20.0.1

[maven-release-plugin] prepare release v20.0.0-legacy

Signed-off-by: Min Jin <[email protected]>

[maven-release-plugin] copy for tag v20.0.0

Merge pull request kubernetes-client#2845 from kubernetes-client/reve…

…rt-2828-reset-release-19

Revert "Release-19: Reset release 19 pom version to 19.0.0-SNAPSHOT"

[maven-release-plugin] copy for tag v18.0.1