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Automatic merge from submit-queue (batch tested with PRs 51244, 50559, 49770, 51194, 50901) Fix zsh completion for kubeadm **What this PR does / why we need it**: kubeadm zsh completion will report an error when using after '--flag': ``` kubeadm join --token=1 __handle_flag:25: bad math expression: operand expected at end of string ``` There is a similar bug in kubectl which has been fixed by #48553. It is due to `__kubeadm_declare` gets 'declare -A' into function scope, and `__kubeadm_declare` could be removed now. This is to port that fix here. **Which issue this PR fixes** **Special notes for your reviewer**: **Release note**: