fix: retain system data on structural_simplify of SDESystem
#5785
| Job | Run time |
|---|---|
| 47m 56s | |
| 32m 29s | |
| 16m 35s | |
| 49m 46s | |
| 23m 13s | |
| 15m 40s | |
| 37s | |
| 32m 34s | |
| 35s | |
| 19m 4s | |
| 26m 32s | |
| 21m 7s | |
| 15m 53s | |
| 5h 2m 1s |