Add _ignored argument to SchemaValidator

[Kludex]

Change Summary

This PR adds a new _ignored keyword argument to the SchemaValidator. The goal is to have a key that is going to be ignored, and it will allow compatibility with the logic implemented in pydantic/pydantic#6820.

Related issue number

• Related to Pydantic plugins - entry-point support pydantic#6820

Checklist

• Unit tests for the changes exist
• Documentation reflects the changes where applicable
• Pydantic tests pass with this pydantic-core (except for expected changes)
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[codecov]

Codecov Report

Merging #822 (54b8915) into main (f5ef7af) will not change coverage.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #822   +/-   ##
=======================================
  Coverage   93.48%   93.48%           
=======================================
  Files         102      102           
  Lines       14606    14606           
  Branches       25       25           
=======================================
  Hits        13655    13655           
  Misses        945      945           
  Partials        6        6           

Files Changed	Coverage Δ
src/url.rs	98.30% <100.00%> (ø)
src/validators/mod.rs	97.73% <100.00%> (ø)

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[codspeed-hq]

CodSpeed Performance Report

Merging #822 will not alter performance

_{Comparing feat/add-_ignored-keyword (54b8915) with main (f5ef7af)}

Summary

✅ 135 untouched benchmarks

[davidhewitt]

Is there a reason we need to store this in the Rust type? Could PluggableSchemaValidator just save this field in __init__?

[Kludex]

Ok. This is not needed! 👀

Thanks @davidhewitt :)