4.0.0
Add `outputRows` and `sortTime` metrics to SortExec.
Example output from Ballista:
```
SortExec { input: ProjectionExec { expr: [(Column { name: "l_shipmode" }, "l_shipmode"), (Column { name: "SUM(CASE WHEN
Metrics: sortTime=44444, outputRows=2
```
Closes #10078 from andygrove/sortexec-metrics
Authored-by: Andy Grove <[email protected]>
Signed-off-by: Andy Grove <[email protected]>