Once https://github.com/elastic/elasticsearch/issues/98503 is done, we can use our minimum version numbers in the SystemIndexMappingUpdate service instead of the old `Version` types. Mappings will be updated for a system index when all nodes have a matching descriptor mappings version for a system index, but this version is greater than what's stored in the mappings metadata.
server/src/test/java/org/elasticsearch/cluster/ClusterStateTests.java
}
                            },
                            "mappings" : { },
                            "aliases" : { }
                          }
                        },
                        "indices" : {
                          "index" : {
                            "version" : 1,
                            "mapping_version" : 1,
                            "settings_version" : 1,
                            "aliases_version" : 1,
                            "routing_num_shards" : 1,
                            "state" : "open",
                            "settings" : {
                              "index" : {
                                "number_of_shards" : "1",
                                "number_of_replicas" : "2",
                                "version" : {
                                  "created" : "%s"
                                }
                              }
                            },
                            "mappings" : {
                              "type" : {
                                "type1" : {
                                  "key" : "value"
                                }
                              }
                            },