Fix strip whitespace ordering

[huyta55]

1. Moved the if self.strip_whitespace {} code to before the minimum and maximum length checks.
2. Changed the logic of string length test's expected value from Err('String should have at most 5 characters') to '1234' for input '1234 ', since the strip_whitespace code will now remove the spaces before the input gets to the length checks, changing the input string to 4 characters instead of 6 characters. Therefore, the input should now pass the length validation instead of throwing an error.
3. Changed the expected value of pattern test ({'strip_whitespace': True, 'pattern': r'\d+$'}, 'foobar 123 ', Err("String should match pattern '\\d+$'")) to 'foobar 123' since the strip_whitespace now removes the trailing ' ', so the input should pass the pattern validation since a digit will be the last character in the string.

[codecov-commenter]

Codecov Report

Merging #264 (457fbfc) into main (feac27e) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #264      +/-   ##
==========================================
- Coverage   98.60%   98.59%   -0.02%     
==========================================
  Files          51       51              
  Lines        5226     5330     +104     
  Branches       37       39       +2     
==========================================
+ Hits         5153     5255     +102     
- Misses         73       75       +2     

Impacted Files	Coverage Δ
src/validators/string.rs	100.00% <100.00%> (ø)
pydantic_core/core_schema.py	99.68% <0.00%> (-0.32%)	⬇️
src/validators/union.rs	98.80% <0.00%> (-0.31%)	⬇️
src/lib.rs	100.00% <0.00%> (ø)
src/errors/value_exception.rs	100.00% <0.00%> (ø)

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[samuelcolvin]

great, thanks so much.