fix: 6732 - price date displayed in local timezone

[monsieurtanuki]

What

• Now the price dates are displayed according to the device timezone.

Screenshots

before	after

Fixes bug(s)

• Fixes: Timezone issue with prices #6732

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 5.36%. Comparing base (4d9c7fc) to head (bc00112).
Report is 955 commits behind head on develop.

Files with missing lines	Patch %	Lines
...smooth_app/lib/pages/prices/price_data_widget.dart	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #6774       +/-   ##
============================================
- Coverage     9.54%    5.36%    -4.19%     
============================================
  Files          325      642      +317     
  Lines        16411   218633   +202222     
============================================
+ Hits          1567    11728    +10161     
- Misses       14844   206905   +192061     

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[teolemon]

LGTM thanks @monsieurtanuki

[monsieurtanuki]

Thank you @teolemon for your reviews!