Add MigratableKVStore trait
#16200
| Job | Run time |
|---|---|
| 7m 55s | |
| 18m 48s | |
| 49m 23s | |
| 15m 1s | |
| 1m 46s | |
| 46m 18s | |
| 51m 1s | |
| 21m 49s | |
| 41m 29s | |
| 18m 42s | |
| 1m 1s | |
| 45m 51s | |
| 38m 16s | |
| 12s | |
| 51m 38s | |
| 58m 23s | |
| 7h 47m 33s |