Add Windows integration tests showing that subst is handled inconsistently
#10262
| Job | Run time |
|---|---|
| 5m 0s | |
| 1m 41s | |
| 3m 49s | |
| 10m 30s |
subst is handled inconsistently
#10262
| Job | Run time |
|---|---|
| 5m 0s | |
| 1m 41s | |
| 3m 49s | |
| 10m 30s |