gh-152168: Don't skip test_bigmem if _testcapi is missing
#270697
| Job | Run time |
|---|---|
| 6s | |
| 5s | |
| 11s |
test_bigmem if _testcapi is missing
#270697
| Job | Run time |
|---|---|
| 6s | |
| 5s | |
| 11s |