Add Windows integration tests showing that subst is handled inconsistently
#25535
| Job | Run time |
|---|---|
| 2m 46s | |
| 3m 18s | |
| 6m 4s |
subst is handled inconsistently
#25535
| Job | Run time |
|---|---|
| 2m 46s | |
| 3m 18s | |
| 6m 4s |