Remove Vault (#3684)

.gitlab-ci.yml

cluster.yml

contrib/vault/groups_vars/vault.yaml

contrib/vault/requirements.txt

contrib/vault/roles/etcd/vault/tasks/gen_certs_vault.yml

...b/vault/roles/etcd/vault/tasks/sync_etcd_master_certs.yml

...rib/vault/roles/etcd/vault/tasks/sync_etcd_node_certs.yml

.../roles/kubernetes/vault-secrets/tasks/gen_certs_vault.yml

...kubernetes/vault-secrets/tasks/sync_kube_master_certs.yml

...s/kubernetes/vault-secrets/tasks/sync_kube_node_certs.yml

contrib/vault/roles/vault/defaults/main.yml

contrib/vault/roles/vault/handlers/main.yml

contrib/vault/roles/vault/meta/main.yml

contrib/vault/roles/vault/tasks/bootstrap/ca_trust.yml

contrib/vault/roles/vault/tasks/bootstrap/create_mounts.yml

contrib/vault/roles/vault/tasks/bootstrap/create_roles.yml

...rib/vault/roles/vault/tasks/bootstrap/gen_vault_certs.yml

contrib/vault/roles/vault/tasks/bootstrap/main.yml

...ib/vault/roles/vault/tasks/bootstrap/start_vault_temp.yml

...rib/vault/roles/vault/tasks/bootstrap/sync_etcd_certs.yml