[Improvement](inverted index) Enhance compaction performance through direct inverted index merging (#19207)

be/src/common/config.h

@@ -934,6 +934,8 @@ CONF_String(inverted_index_dict_path, "${DORIS_HOME}/dict");
 CONF_Int32(inverted_index_read_buffer_size, "4096");
 // tree depth for bkd index
 CONF_Int32(max_depth_in_bkd_tree, "32");
+// index compaction
+CONF_Bool(inverted_index_compaction_enable, "false");
 // use num_broadcast_buffer blocks as buffer to do broadcast
 CONF_Int32(num_broadcast_buffer, "32");
 // semi-structure configs