9ac0aa7bba
This commit adds documentation for zero-token nodes and an explanation of how to use them to set up an arbiter DC to prevent a quorum loss in multi-DC deployments. The commit adds two documents: - The one in Architecture describes zero-token nodes. - The other in Cluster Management explains how to use them. We need separate documents because zero-token nodes may be used for other purposes in the future. In addition, the documents are cross-linked, and the link is added to the Create a ScyllaDB Cluster - Multi Data Centers (DC) document. Refs https://github.com/scylladb/scylladb/pull/19684 Fixes https://github.com/scylladb/scylladb/issues/20294 Closes scylladb/scylladb#21348
