fix: wdl run should join input paths correctly.
#1713
| Job | Run time |
|---|---|
| 1m 50s | |
| 13s | |
| 6m 49s | |
| 7m 0s | |
| 2m 59s | |
| 3m 8s | |
| 1m 12s | |
| 2m 34s | |
| 55s | |
| 1m 24s | |
| 2m 46s | |
| 4m 14s | |
| 29s | |
| 2m 21s | |
| 2m 54s | |
| 6m 25s | |
| 47m 13s |