`sst_dump --command=verify` should verify block checksums (#11576)

Summary:
`sst_dump --command=verify` did not set read_options.verify_checksum to true so it was not verifying checksum.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11576

Test Plan:
ran the same command on an SST file with bad checksum:
```
sst_dump --command=verify --file=...sst_file_with_bad_block_checksum

Before this PR:
options.env is 0x6ba048
Process ...sst_file_with_bad_block_checksum
Sst file format: block-based
The file is ok

After this PR:
options.env is 0x7f43f6690000
Process ...sst_file_with_bad_block_checksum
Sst file format: block-based
... is corrupted: Corruption: block checksum mismatch: stored = 2170109798, computed = 2170097510, type = 4  ...
```

Reviewed By: ajkr

Differential Revision: D47136284

Pulled By: cbi42

fbshipit-source-id: 07d68db715c00347145e5b83d649aef2c3f2acd9

table/sst_file_dumper.cc

@@ -196,6 +196,7 @@ Status SstFileDumper::NewTableReader(
 }
 
 Status SstFileDumper::VerifyChecksum() {
+  assert(read_options_.verify_checksums);
   // We could pass specific readahead setting into read options if needed.
   return table_reader_->VerifyChecksum(read_options_,
                                        TableReaderCaller::kSSTDumpTool);

tools/sst_dump_tool.cc

@@ -419,6 +419,10 @@ int SSTDumpTool::Run(int argc, char const* const* argv, Options options) {
       filename = std::string(dir_or_file) + "/" + filename;
     }
 
+    if (command == "verify") {
+      verify_checksum = true;
+    }
+
     ROCKSDB_NAMESPACE::SstFileDumper dumper(
         options, filename, Temperature::kUnknown, readahead_size,
         verify_checksum, output_hex, decode_blob_index);