GROOVY-11559: fix addAllInterfaces for UnionTypeClassNode
#4634
| Job | Run time |
|---|---|
| 9m 45s | |
| 10m 22s | |
| 8m 11s | |
| 12m 39s | |
| 10m 30s | |
| 11m 36s | |
| 12m 11s | |
| 12m 1s | |
| 13m 5s | |
| 16m 37s | |
| 18m 18s | |
| 2h 15m 15s |