fix: introduce backport version for #104683 (#116804)

Author: salvatore-campagna

server/src/main/java/org/elasticsearch/cluster/routing/IndexRouting.java

@@ -167,7 +167,8 @@ public void process(IndexRequest indexRequest) {
             // generate id if not already provided
             final String id = indexRequest.id();
             if (id == null) {
-                if (creationVersion.onOrAfter(IndexVersions.TIME_BASED_K_ORDERED_DOC_ID) && indexMode == IndexMode.LOGSDB) {
+                if (creationVersion.between(IndexVersions.TIME_BASED_K_ORDERED_DOC_ID_BACKPORT, IndexVersions.UPGRADE_TO_LUCENE_10_0_0)
+                    || creationVersion.onOrAfter(IndexVersions.TIME_BASED_K_ORDERED_DOC_ID) && indexMode == IndexMode.LOGSDB) {
                     indexRequest.autoGenerateTimeBasedId();
                 } else {
                     indexRequest.autoGenerateId();

server/src/main/java/org/elasticsearch/index/IndexVersions.java

@@ -130,6 +130,7 @@ private static Version parseUnchecked(String version) {
     public static final IndexVersion ENABLE_IGNORE_ABOVE_LOGSDB = def(8_517_00_0, Version.LUCENE_9_12_0);
     public static final IndexVersion ADD_ROLE_MAPPING_CLEANUP_MIGRATION = def(8_518_00_0, Version.LUCENE_9_12_0);
     public static final IndexVersion LOGSDB_DEFAULT_IGNORE_DYNAMIC_BEYOND_LIMIT_BACKPORT = def(8_519_00_0, Version.LUCENE_9_12_0);
+    public static final IndexVersion TIME_BASED_K_ORDERED_DOC_ID_BACKPORT = def(8_520_00_0, Version.LUCENE_9_12_0);
     public static final IndexVersion UPGRADE_TO_LUCENE_10_0_0 = def(9_000_00_0, Version.LUCENE_10_0_0);
     public static final IndexVersion LOGSDB_DEFAULT_IGNORE_DYNAMIC_BEYOND_LIMIT = def(9_001_00_0, Version.LUCENE_10_0_0);
     public static final IndexVersion TIME_BASED_K_ORDERED_DOC_ID = def(9_002_00_0, Version.LUCENE_10_0_0);