Fixed display of timestamp with tz.

[jorgecarleitao]

When a timestamp has a timezone, it is stored as UTC and the timezone denotes the representation. Thus, 0i64, representing 1970-01-01 00:00:00.0 with an offset of +02:00 should be represented as 1970-01-01 02:00:00.0 +02:00.

[codecov]

Codecov Report

Merging #375 (56d34ec) into main (dbb7b8a) will increase coverage by 0.00%.
The diff coverage is 62.50%.

@@           Coverage Diff           @@
##             main     #375   +/-   ##
=======================================
  Coverage   81.08%   81.09%           
=======================================
  Files         328      328           
  Lines       21748    21772   +24     
=======================================
+ Hits        17635    17655   +20     
- Misses       4113     4117    +4     

Impacted Files	Coverage Δ
tests/it/io/print.rs	100.00% <ø> (ø)
src/array/display.rs	61.70% <50.00%> (+2.57%)	⬆️
src/temporal_conversions.rs	75.38% <60.00%> (-4.62%)	⬇️
tests/it/array/primitive/mod.rs	100.00% <100.00%> (ø)

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