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Refs: SCYLLADB-193 Adds a "snapshot_table" topology operation and associated data structure/table columns to support dispatching a snapshot operation as a topo coordinator op. Logic is similar, and thus broken out and semi-shared with, truncation. Also adds optional tablet metadata to manifest, listing all tablets present in a given snapshot, as well as tablet sstable ownership, repair status, and token ranges. As per description in SCYLLADB-193, the alternative snapshot mechanism is in a separate namespace under 'tablets', which while dubious is the desired destination. The API is accessed via `nodetool cluster snapshot`, which more or less mirrors `nodetool snapshot`, but using topo op. TTL is added to message propagation as a separate patch here, since it is not (yet) used from API (or nodetool). Requires a syntax for both API and command line. Closes scylladb/scylladb#28525 * github.com:scylladb/scylladb: topology::snapshot: Add expiry (ttl) to RPC/topo op test_snapshot_with_tablets: Extend test to check manifest content table::manifest: Add tablet info to manifest.json test::test_snapshot_with_tablets: Add small test for topo coordinated snapshot scylla-nodetool: Add "cluster snapshot" command api::storage_service: Add tablets/snapshots command for cluster level snapshot db::snapshot-ctl: Add method to do snapshot using topo coordinator storage_proxy: Add snapshot_keyspace method topology_coordinator: Add handler for snapshot_tables storage_proxy: Add handler for SNAPSHOT_WITH_TABLETS messaging_service: Add SNAPSHOT_WITH_TABLETS verb feature_service: Add SNAPSHOT_AS_TOPOLOGY_OPERATION feature topology_mutation: Add setter for snapshot part of row system_keyspace::topology_requests_entry: Add snapshot info to table topology_state_machine: Add snapshot_tables operation topology_coordinator: Break out logic from handle_truncate_table storage_proxy: Break out logic from request_truncate_with_tablets test/object_store: Remove create_ks_and_cf() helper test/object_store: Replace create_ks_and_cf() usage with standard methods test/object_store: Shift indentation right for test cases