Starting from stable/2024.1, we no longer need a cluster store
for docker. Therefore, we change the installation steps as follows:
* Remove the --cluster-store option from Docker
* Remove the etcd requirement (since we don't need to use it as cluster store).
* Switch capability_scope to "local" (the default) in kuryr-libnetwork.
Related-Bug: #2007142
Change-Id: I5cb0df5c0c65a4e54841ffb9e8450b21446a5fdd
b480d7106e