chore(ci): pin greenlet version to 3.1.0 for 3.8 [backport 2.19]
#12602
| Job | Run time |
|---|---|
| 3m 30s | |
| 3m 28s | |
| 3m 34s | |
| 4m 30s | |
| 5m 10s | |
| 4m 39s | |
| 37s | |
| 2m 58s | |
| 3m 16s | |
| 31m 42s |