fix: model validator assignment consistency

Fix inconsistency where model-level before and wrap validators received
different states during field assignment validation.

- Before validators now see pre-update state (consistent with wrap validators)
- Updated test expectations to match correct behavior
- Fixed linting issues (removed unused noqa directives)

Fixes: pydantic/pydantic#11823

Author: mot3

tests/validators/test_model.py

@@ -1165,12 +1165,12 @@ class MyModel:
         (
             core_schema.with_info_before_validator_function,
             ({'b': 2}, 'ValidationInfo(config=None, context=None, data=None, field_name=None)'),
-            ({'a': 10, 'b': 2}, "ValidationInfo(config=None, context=None, data=None, field_name='a')"),
+            ({'a': 1, 'b': 2}, "ValidationInfo(config=None, context=None, data=None, field_name='a')"),
         ),
         (
             core_schema.with_info_wrap_validator_function,
             ({'b': 2}, 'ValidationInfo(config=None, context=None, data=None, field_name=None)'),
-            ({'a': 10, 'b': 2}, "ValidationInfo(config=None, context=None, data=None, field_name='a')"),
+            ({'a': 1, 'b': 2}, "ValidationInfo(config=None, context=None, data=None, field_name='a')"),
         ),
     ],
 )