Precision loss when coercing date_part utf8 argument

[Dandandan]

Describe the bug

In a recent version of DataFusion

select date_part('second', '2020-09-08T12:00:12.12345678+00:00');
+----------------------------------------------------------------------+
| date_part(Utf8("second"),Utf8("2020-09-08T12:00:12.12345678+00:00")) |
+----------------------------------------------------------------------+
| 12.0                                                                 |
+----------------------------------------------------------------------+

Expected (I get this answer in DataFusion 28).

❯ select date_part('second', '2020-09-08T12:00:12.12345678+00:00');
+----------------------------------------------------------------------+
| date_part(Utf8("second"),Utf8("2020-09-08T12:00:12.12345678+00:00")) |
+----------------------------------------------------------------------+
| 12.12345678                                                          |
+----------------------------------------------------------------------+
1 row in set. Query took 0.015 seconds.

To Reproduce

No response

Expected behavior

No response

Additional context

No response