feat: add C implementation for stats/base/dists/lognormal/mean
#15300
| Job | Run time |
|---|---|
| 2m 24s | |
| 2m 24s |
stats/base/dists/lognormal/mean
#15300
| Job | Run time |
|---|---|
| 2m 24s | |
| 2m 24s |