feat(DTO): Support extra="forbid" model config for PydanticDTO

[provinzkraut]

Set forbid_unkown_fields=True for PydanticDTOs where the Pydantic model has an extra="forbid" config.

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• Add a new get_config_for_model_type method to AbstractDTO, that allows to customise the base config defined on the DTO factory for a specific model type
• Use get_config_for_model_type to set forbid_unkown_fields=True for Pydantic models that use the `extra="forbid" config

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Depends on #3690. Don't merge before that one :)

[provinzkraut]

@peterschutt to keep you in the loop a bit. This isn't really merging configurations, but it's a step in the right direction and at least allows per-model dynamic configs. I think this should help to handle a few of the use cases of config merging already.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.28%. Comparing base (9cff0a4) to head (02b8d44).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3691   +/-   ##
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  Coverage   98.28%   98.28%           
=======================================
  Files         329      329           
  Lines       14949    14965   +16     
  Branches     2375     2382    +7     
=======================================
+ Hits        14692    14708   +16     
  Misses        116      116           
  Partials      141      141           

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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

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[github-actions]

Documentation preview will be available shortly at https://litestar-org.github.io/litestar-docs-preview/3691

[peterschutt]

I think this should help to handle a few of the use cases of config merging already.

Sounds great! Thanks for the ping:)