Quick answer.

You cannot stop Apiserver.

If you remove the pod it will be rescheduled, so you would need to remove the kube-apiserver.yaml from /etc/kubernetes/manifests first.

If you do that you won't be able to edit etcd.

Etcd is an open-source distributed key-value store that serves as the backbone of distributed systems by providing a canonical hub for cluster coordination and state management – the systems source of truth.

You can edit values manually by going into etcd pod and changing the data, but this is a bit problematic.

Or you can use etcdctl tool.

etcdctl is a command line client for etcd. It can be used in scripts or for administrators to explore an etcd cluster.

ETCDCTL_API=3 etcdctl --endpoints=https://[127.0.0.1]:2379 --cacert=/etc/kubernetes/pki
/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/healthcheck-client.crt --key=/etc/kubernetes/pki/etcd/healthcheck-client.key