feat(Pydantic): Add validate_strict option to Pydantic plugin to support Pydantic 2's strict model_validate mode

[provinzkraut]

Add a new validate_strict parameter to PydanticInitPlugin, which will be passed as the value of the strict parameter of Pydantic's BaseModel.model_validate.

app = Litestar(
    plugins=[PydanticInitPlugin(validate_strict=True)]
)

Closes #3572.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.28%. Comparing base (65f01ea) to head (fcc76ab).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3573   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files         328      328           
  Lines       14841    14843    +2     
  Branches     2362     2362           
=======================================
+ Hits        14586    14588    +2     
  Misses        116      116           
  Partials      139      139           

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Documentation preview will be available shortly at https://litestar-org.github.io/litestar-docs-preview/3573