22.0.0-legacy version of the client is not compatible with Java 8

[rajathvkamath]

Describe the bug
Hello Team,

The v22.0.0-legacy build(https://github.com/kubernetes-client/java/releases/tag/v22.0.0-legacy) was made available recently. This version sets the minimum JDK version to 11 and thus is not compatible with Java 8 runtime. The "-legacy" bundles are supposed to be compatible with Java8. Isn't that the case anymore?
cc: @yue9944882 @brendandburns

[yue9944882]

#3890

We're going to cut a v22.0.1[-legacy] release to fix this issue as well.. Somehow our release workflow lost permission to this github repository so the last v22.0.0-legacy was done manually hence it missed something..