arrow

ARROW-13896: [Python] Print of timestamp with timezone errors

The initial commit fixes the issue of printing the value of a pyarrow scalar as it errored due to the mismatch of `tzinfo` between `self` and `dt` in `fromutc`.

What I also want to do is to correct the `__str__` method for array class that uses `to_string()` method and ignores tz info. I don't know how to approach this problem as the `to_string()` is not really clear to me. Will do some more research, ideas are welcome.

Due to the second part this PR is not complete yet.

Closes #11574 from AlenkaF/ARROW-13896

Authored-by: Alenka Frim <frim.alenka@gmail.com>
Signed-off-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>