infra: use new del_branch_on_merge in .asf.yaml
#3898
| Job | Run time |
|---|---|
| 1m 3s | |
| 1m 3s |
del_branch_on_merge in .asf.yaml
#3898
| Job | Run time |
|---|---|
| 1m 3s | |
| 1m 3s |