[hotfix] Add bucket info for error info while loading the stored index file (apache#1713)

Author: LiebingYu

fluss-server/src/main/java/org/apache/fluss/server/log/remote/RemoteLogIndexCache.java

@@ -476,8 +476,9 @@ private <T> T loadIndexFile(
                 index = readIndex.apply(indexFile);
             } catch (CorruptIndexException ex) {
                 LOG.info(
-                        "Error occurred while loading the stored index file {}",
+                        "Error occurred while loading the stored index file {} for bucket {}",
                         indexFile.getPath(),
+                        remoteLogSegment.tableBucket(),
                         ex);
             }
         }