refactor: use dataclass field instead of Pydantic field

[sisp]

Pydantic v2 prior to v2.0.3 had a bug related to using a Pydantic dataclass with a vanilla dataclass field with a default factory and init=False which required a workaround on our side to use Pydantic's Field() instead of vanilla field(). Since this bug has been fixed in v2.0.3, I've removed the workaround and bumped our minimum required Pydantic version to v2.0.3.

[codecov]

Codecov Report

Merging #1249 (8c33d29) into master (9888571) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1249      +/-   ##
==========================================
+ Coverage   96.72%   96.77%   +0.05%     
==========================================
  Files          47       47              
  Lines        3935     3935              
==========================================
+ Hits         3806     3808       +2     
+ Misses        129      127       -2     

Flag	Coverage Δ
unittests	96.77% <100.00%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
copier/main.py	95.66% <100.00%> (ø)
copier/user_data.py	94.65% <100.00%> (ø)

... and 1 file with indirect coverage changes