[fix](inverted index)Make build index operation only affect base index (#36869) (#36988)

backport #36869

fe/fe-core/src/main/java/org/apache/doris/alter/SchemaChangeHandler.java

@@ -2932,6 +2932,8 @@ public class SchemaChangeHandler extends AlterHandler {
         // for now table's state can only be NORMAL
         Preconditions.checkState(olapTable.getState() == OlapTableState.NORMAL, olapTable.getState().name());
 
+        // remove the index which is not the base index, only base index can be built inverted index
+        indexSchemaMap.entrySet().removeIf(entry -> !entry.getKey().equals(olapTable.getBaseIndexId()));
         // begin checking each table
         Map<Long, List<Column>> changedIndexIdToSchema = Maps.newHashMap();
         try {