Ensure that the wt utility supports tiered tables. 

1. Determine the set of wt methods that should work on tiered tables in the context of PM-2523.
2. Ensure that these methods work with tiered tables. This may be as simple as writing new test_util??.py cases. Or it may also require enhancing wt.
3. Ensure that wt returns a suitable error message for any cases that aren't (yet) supported with tiered tables, such as verify and salvage. This will require modifications to wt as well as accompanying test cases.