Allow when creating a Transaction() use PatchedCursor

For now if we want to patch the creation of new cursors inside a test we have to do:

```python
with Transaction().start(self.database) as txn:
    with PatchNewCursors():
        ...
```
Maybe we can add the possibillity in creation a new Transaction to define to use `PatchedCursors` as

```python
with Transaction(same_cursor=True).start(self.database) as txn:
    ...
```
