Fix sst_dump not able to open ingested file (#6673)

Summary:
When investigating https://github.com/facebook/rocksdb/issues/6666, we encounter an error for sst_dump to dump an ingested SST file with global seqno.
```
Corruption: An external sst file with version 2 have global seqno property with value ��/, while largest seqno in the file is 0）
```

Same as https://github.com/facebook/rocksdb/pull/5097, it is due to SstFileReader don't know the largest seqno of a file, it will fail this check when it open a file with global seqno. ca89ac2ba9/table/block_based_table_reader.cc (L730)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6673

Test Plan: run it manually

Reviewed By: cheng-chang

Differential Revision: D20937546

Pulled By: ajkr

fbshipit-source-id: c3fd04d60916a738533ee1885f3ea844669a9479

tools/sst_dump_tool.cc

@@ -131,20 +131,22 @@ Status SstFileDumper::NewTableReader(
     const ImmutableCFOptions& /*ioptions*/, const EnvOptions& /*soptions*/,
     const InternalKeyComparator& /*internal_comparator*/, uint64_t file_size,
     std::unique_ptr<TableReader>* /*table_reader*/) {
+  auto t_opt = TableReaderOptions(ioptions_, moptions_.prefix_extractor.get(),
+                                  soptions_, internal_comparator_);
+  // Allow open file with global sequence number for backward compatibility.
+  t_opt.largest_seqno = kMaxSequenceNumber;
+
   // We need to turn off pre-fetching of index and filter nodes for
   // BlockBasedTable
   if (BlockBasedTableFactory::kName == options_.table_factory->Name()) {
-    return options_.table_factory->NewTableReader(
-        TableReaderOptions(ioptions_, moptions_.prefix_extractor.get(),
-                           soptions_, internal_comparator_),
-        std::move(file_), file_size, &table_reader_, /*enable_prefetch=*/false);
+    return options_.table_factory->NewTableReader(t_opt, std::move(file_),
+                                                  file_size, &table_reader_,
+                                                  /*enable_prefetch=*/false);
   }
 
   // For all other factory implementation
-  return options_.table_factory->NewTableReader(
-      TableReaderOptions(ioptions_, moptions_.prefix_extractor.get(), soptions_,
-                         internal_comparator_),
-      std::move(file_), file_size, &table_reader_);
+  return options_.table_factory->NewTableReader(t_opt, std::move(file_),
+                                                file_size, &table_reader_);
 }
 
 Status SstFileDumper::VerifyChecksum() {