DateTime::Format::* does not have fromat_timestamp_without_timezone m…

[KES777]

FIXES: RT133622

https://metacpan.org/pod/DateTime::Format::Oracle
https://metacpan.org/pod/DateTime::Format::Pg

Has method 'format_timestamp_with_time_zone' so we should rename

[abraxxa]

So there is no test for this, neither for Oracle nor for PostgreSQL so this was unnoticed for so many years?
I guess that it was a typo in the initial implementation.
DateTime::Format::Oracle has it wrong in its Changes file as well, was added in 0.05.
Looks like nobody is storing timezones, at least we don't and convert to/from UTC.

Please add at least one test case so it can't happen again, thanks!