Fix replay binlog gc when not found db binlog (#31463)

Signed-off-by: Jack Drogon <jack.xsuperman@gmail.com>

fe/fe-core/src/main/java/org/apache/doris/binlog/BinlogManager.java

@@ -397,6 +397,10 @@ public class BinlogManager {
         for (BinlogTombstone tombstone : binlogGcInfo.getTombstones()) {
             long dbId = tombstone.getDbId();
             DBBinlog dbBinlog = gcDbBinlogMap.get(dbId);
+            if (dbBinlog == null) {
+                LOG.warn("dbBinlog not found. dbId: {}", dbId);
+                continue;
+            }
             dbBinlog.replayGc(tombstone);
         }
     }