Update TableFormat metric to TableStructure + fix its computation
#1566
| Job | Run time |
|---|---|
| 3m 59s | |
| 6m 7s | |
| 10m 55s | |
| 4m 25s | |
| 8m 46s | |
| 11m 34s | |
| 4m 11s | |
| 6m 52s | |
| 7m 44s | |
| 3m 53s | |
| 4m 30s | |
| 11m 26s | |
| 1h 24m 22s |