Add Windows integration tests showing that subst is handled inconsistently
#25560
| Job | Run time |
|---|---|
| 1m 49s | |
| 3m 21s | |
| 5m 10s |
subst is handled inconsistently
#25560
| Job | Run time |
|---|---|
| 1m 49s | |
| 3m 21s | |
| 5m 10s |