gh-157290: Add support for %Nf to datetime.str{f,p}time()
#302651
| Job | Run time |
|---|---|
| 5s | |
| 12s | |
| 17s |
%Nf to datetime.str{f,p}time()
#302651
| Job | Run time |
|---|---|
| 5s | |
| 12s | |
| 17s |