The QLocale XML reader was passing datetime formats through a format
conversion despite the data being converted at the point where we read
it from CLDR. It turns out this was needed because the long date and
time formats in our hard-coded data for the C Locale object used CLDR
format strings, unlike all other Locale objects. Fix those two formats
in the C locale and remove the redundant processing step. This, in
turn, enables the parser to include the date and time formats in its
general handling of most fields that it reads.
This does not result in any change to the generated data QLocale uses
(although it does change the intermediate QLocale XML file).
Task-number: QTBUG-115158
Change-Id: Iaf9da206158043dda2e9e5a3790f009b100e46b4
Reviewed-by: Mate Barany <mate.barany@qt.io>