gh-131798: Constant-fold _CONTAINS_OP_DICT for frozendict
#6177
| Job | Run time |
|---|---|
| 12m 55s | |
| 13m 5s | |
| 13m 26s | |
| 12m 52s | |
| 11m 12s | |
| 9m 1s | |
| 12m 30s | |
| 6m 56s | |
| 12m 48s | |
| 12m 56s | |
| 3m 48s | |
| 12m 56s | |
| 12m 44s | |
| 4m 37s | |
| 3m 48s | |
| 13m 22s | |
| 13m 39s | |
| 9m 20s | |
| 3h 11m 55s |