[pep8-naming]: Ignore methods decorated with @typing.override (invalid-argument-name) (#16667)

## Summary

This PR stabilizes the preview behavior for `invalid-argument-name`
(`N803`)
to ignore argument names of functions decorated with `typing.override`
because
these methods are *out of the authors* control. 

This behavior was introduced in
#15954
and released as part of Ruff 0.9.5 (6th of February). 

There have been no new issues or PRs since this behavior change
(preview) was introduced.

Author: MichaReiser

crates/ruff_linter/src/rules/pep8_naming/mod.rs

@@ -89,7 +89,6 @@ mod tests {
         Ok(())
     }
 
-    #[test_case(Rule::InvalidArgumentName, Path::new("N803.py"))]
     #[test_case(Rule::InvalidArgumentName, Path::new("N804.py"))]
     fn preview_rules(rule_code: Rule, path: &Path) -> Result<()> {
         let snapshot = format!(

crates/ruff_linter/src/rules/pep8_naming/rules/invalid_argument_name.rs

@@ -23,7 +23,7 @@ use crate::checkers::ast::Checker;
 /// > mixedCase is allowed only in contexts where that’s already the
 /// > prevailing style (e.g. threading.py), to retain backwards compatibility.
 ///
-/// In [preview], overridden methods are ignored.
+/// Methods decorated with `@typing.override` are ignored.
 ///
 /// ## Example
 /// ```python
@@ -61,8 +61,7 @@ pub(crate) fn invalid_argument_name_function(checker: &Checker, function_def: &S
     let semantic = checker.semantic();
     let scope = semantic.current_scope();
 
-    if checker.settings.preview.is_enabled()
-        && matches!(scope.kind, ScopeKind::Class(_))
+    if matches!(scope.kind, ScopeKind::Class(_))
         && is_override(&function_def.decorator_list, semantic)
     {
         return;

crates/ruff_linter/src/rules/pep8_naming/snapshots/ruff_linter__rules__pep8_naming__tests__N803_N803.py.snap

@@ -16,14 +16,6 @@ N803.py:6:28: N803 Argument name `A` should be lowercase
 7 |         return _, a, A
   |
 
-N803.py:18:28: N803 Argument name `A` should be lowercase
-   |
-16 | class Extended(Class):
-17 |     @override
-18 |     def method(self, _, a, A): ...
-   |                            ^ N803
-   |
-
 N803.py:22:16: N803 Argument name `A` should be lowercase
    |
 21 | @override  # Incorrect usage