Automatically add ISO input formats to all localized input formats.
Fixed #19015 -- Add ISO input formats to all formats
Removed ISO formats from localized formats.py
ISO formats are automatically appended to the list of input
formats. Kept only when it is specified in first position, as it
has a special meaning in localize_input.
Maybe we should note that we kept (TIME_INPUT) ISO formats as they are in first position here too.
Thanks, already done on my local branch.
Committed in 90d3af3