BUG: resample with empty DatetimeIndex/TimedeltaIndex buggy
xref `PeriodIndex` addressed in #12874 

[here](https://github.com/pydata/pandas/commit/2ba977a917ac5c092378a2f172f59d53b14de968) is the reverted commit. Note this should be rolled in the `test_resample_empty` test itself
