Disable attribute group txn tests (facebook#12851)

Summary:
Transactions are not yet supported in AttributeGroup APIs. Disabling `use_attribute_group` for txn tests

Pull Request resolved: facebook#12851

Test Plan:
Verified output that `--use_attribute_group=0`

```
python3 tools/db_crashtest.py whitebox --txn
```
```
python3 tools/db_crashtest.py whitebox --optimistic_txn
```

Reviewed By: hx235

Differential Revision: D59565635

Pulled By: jaykorean

fbshipit-source-id: 7d618f475b6d2e5a53c3c59cdf1e694f3893ae58

tools/db_crashtest.py

@@ -523,6 +523,8 @@ def is_direct_io_supported(dbname):
     "inplace_update_support": 0,
     # TimedPut is not supported in transaction
     "use_timed_put_one_in": 0,
+    # AttributeGroup not yet supported
+    "use_attribute_group": 0,
 }
 
 # For optimistic transaction db
@@ -536,6 +538,8 @@ def is_direct_io_supported(dbname):
     "inplace_update_support": 0,
     # TimedPut is not supported in transaction
     "use_timed_put_one_in": 0,
+    # AttributeGroup not yet supported
+    "use_attribute_group": 0,
 }
 
 best_efforts_recovery_params = {