[3.17] backport 11204 - remove errors message from dune subst with empty dir
#29298
| Job | Run time |
|---|---|
| 7m 2s | |
| 10m 45s | |
| 2m 37s | |
| 13m 48s | |
| 8m 34s | |
| 5m 42s | |
| 57s | |
| 1m 39s | |
| 1m 11s | |
| 6m 40s | |
| 1m 34s | |
| 6m 20s | |
| 3m 47s | |
| 2m 19s | |
| 5m 18s | |
| 2m 43s | |
| 3m 54s | |
| 56s | |
| 11m 39s | |
| 14m 18s | |
| 8m 13s | |
| 1m 37s | |
| 4m 46s | |
| 3m 58s | |
| 2h 10m 17s |