R1:798a391e5a90

Add test coverage for "%R" in qsprintf() and convert LiskDAO to support it

Summary:
Ref T13210. Ref T11908. Add some basic test coverage for the new "%R" introduced in D19764, then convert LiskDAO to implement the "Database + Table Ref" interface.

To move forward, we need to convert all of these (where `%T` is not a table alias):

```counterexample
qsprintf($conn, '... %T ...', $thing->getTableName());
```

...to these:

```
qsprintf($conn, '... %R ...', $thing);
```

The new code is a little simpler (no…