Enable checkpoint and backup in db_stress when timestamp is enabled (#10047)

Summary:
After https://github.com/facebook/rocksdb/issues/10030 and https://github.com/facebook/rocksdb/issues/10004, we can enable checkpoint and backup in stress tests when
user-defined timestamp is enabled.

This PR has no production risk.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10047

Test Plan:
```
TEST_TMPDIR=/dev/shm make crash_test_with_ts
```

Reviewed By: jowlyzhang

Differential Revision: D36641565

Pulled By: riversand963

fbshipit-source-id: d86c9d87efcc34c32d1aa176af691d32b897644a

db_stress_tool/db_stress_test_base.cc

@@ -1795,9 +1795,17 @@ Status StressTest::TestCheckpoint(ThreadState* thread,
     for (size_t i = 0; s.ok() && i < rand_column_families.size(); ++i) {
       std::string key_str = Key(rand_keys[0]);
       Slice key = key_str;
+      std::string ts_str;
+      Slice ts;
+      ReadOptions read_opts;
+      if (FLAGS_user_timestamp_size > 0) {
+        ts_str = GenerateTimestampForRead();
+        ts = ts_str;
+        read_opts.timestamp = &ts;
+      }
       std::string value;
       Status get_status = checkpoint_db->Get(
-          ReadOptions(), cf_handles[rand_column_families[i]], key, &value);
+          read_opts, cf_handles[rand_column_families[i]], key, &value);
       bool exists =
           thread->shared->Exists(rand_column_families[i], rand_keys[0]);
       if (get_status.ok()) {
@@ -2764,13 +2772,6 @@ void CheckAndSetOptionsForUserTimestamp(Options& options) {
     fprintf(stderr, "Secondary instance does not support timestamp.\n");
     exit(1);
   }
-  if (FLAGS_checkpoint_one_in > 0) {
-    fprintf(stderr,
-            "-checkpoint_one_in=%d requires "
-            "DBImplReadOnly, which is not supported with timestamp\n",
-            FLAGS_checkpoint_one_in);
-    exit(1);
-  }
 #ifndef ROCKSDB_LITE
   if (FLAGS_enable_blob_files || FLAGS_use_blob_db) {
     fprintf(stderr, "BlobDB not supported with timestamp.\n");

tools/db_crashtest.py

@@ -341,14 +341,13 @@ ts_params = {
     "test_cf_consistency": 0,
     "test_batches_snapshots": 0,
     "user_timestamp_size": 8,
+    "delrangepercent": 0,
+    "delpercent": 5,
     "use_merge": 0,
     "use_full_merge_v1": 0,
     "use_txn": 0,
-    "read_only": 0,
-    "backup_one_in": 0,
     "secondary_catch_up_one_in": 0,
     "continuous_verification_interval": 0,
-    "checkpoint_one_in": 0,
     "enable_blob_files": 0,
     "use_blob_db": 0,
     "enable_compaction_filter": 0,