Rebase and move whatsnew to v0.23

Author: mroeschke

doc/source/whatsnew/v0.23.0.txt

@@ -380,7 +380,7 @@ Conversion
 - Fixed bug where comparing :class:`DatetimeIndex` failed to raise ``TypeError`` when attempting to compare timezone-aware and timezone-naive datetimelike objects (:issue:`18162`)
 - Bug in :class:`DatetimeIndex` where the repr was not showing high-precision time values at the end of a day (e.g., 23:59:59.999999999) (:issue:`19030`)
 - Bug where dividing a scalar timedelta-like object with :class:`TimedeltaIndex` performed the reciprocal operation (:issue:`19125`)
--
+- Bug in localization of a naive, datetime string in a ``Series`` constructor with a ``datetime[ns, timezone]`` dtype (:issue:`174151`)
 
 Indexing
 ^^^^^^^^