fix(rules): skip dummy variables for PLR1704 (#12190)

## Summary

Resolves #12157.

## Test Plan

Snapshot tests.

crates/ruff_linter/resources/test/fixtures/pylint/redefined_argument_from_local.py

@@ -21,6 +21,11 @@ def func(a):
         print(a)
 
 
+def func(_):
+    for _ in range(1):
+        ...
+
+
 # Errors
 def func(a):
     for a in range(1):

crates/ruff_linter/src/checkers/ast/analyze/deferred_scopes.rs

@@ -136,6 +136,9 @@ pub(crate) fn deferred_scopes(checker: &mut Checker) {
                     if !shadowed.kind.is_argument() {
                         continue;
                     }
+                    if checker.settings.dummy_variable_rgx.is_match(name) {
+                        continue;
+                    }
                     checker.diagnostics.push(Diagnostic::new(
                         pylint::rules::RedefinedArgumentFromLocal {
                             name: name.to_string(),

crates/ruff_linter/src/rules/pylint/snapshots/ruff_linter__rules__pylint__tests__PLR1704_redefined_argument_from_local.py.snap

@@ -1,115 +1,113 @@
 ---
 source: crates/ruff_linter/src/rules/pylint/mod.rs
 ---
-redefined_argument_from_local.py:26:9: PLR1704 Redefining argument with the local name `a`
+redefined_argument_from_local.py:31:9: PLR1704 Redefining argument with the local name `a`
    |
-24 | # Errors
-25 | def func(a):
-26 |     for a in range(1):
+29 | # Errors
+30 | def func(a):
+31 |     for a in range(1):
    |         ^ PLR1704
-27 |         ...
+32 |         ...
    |
 
-redefined_argument_from_local.py:31:9: PLR1704 Redefining argument with the local name `i`
+redefined_argument_from_local.py:36:9: PLR1704 Redefining argument with the local name `i`
    |
-30 | def func(i):
-31 |     for i in range(10):
+35 | def func(i):
+36 |     for i in range(10):
    |         ^ PLR1704
-32 |         print(i)
+37 |         print(i)
    |
 
-redefined_argument_from_local.py:38:25: PLR1704 Redefining argument with the local name `e`
+redefined_argument_from_local.py:43:25: PLR1704 Redefining argument with the local name `e`
    |
-36 |     try:
-37 |         ...
-38 |     except Exception as e:
+41 |     try:
+42 |         ...
+43 |     except Exception as e:
    |                         ^ PLR1704
-39 |         print(e)
+44 |         print(e)
    |
 
-redefined_argument_from_local.py:43:24: PLR1704 Redefining argument with the local name `f`
+redefined_argument_from_local.py:48:24: PLR1704 Redefining argument with the local name `f`
    |
-42 | def func(f):
-43 |     with open('', ) as f:
+47 | def func(f):
+48 |     with open('', ) as f:
    |                        ^ PLR1704
-44 |         print(f)
+49 |         print(f)
    |
 
-redefined_argument_from_local.py:48:24: PLR1704 Redefining argument with the local name `a`
+redefined_argument_from_local.py:53:24: PLR1704 Redefining argument with the local name `a`
    |
-47 | def func(a, b):
-48 |     with context() as (a, b, c):
+52 | def func(a, b):
+53 |     with context() as (a, b, c):
    |                        ^ PLR1704
-49 |         print(a, b, c)
+54 |         print(a, b, c)
    |
 
-redefined_argument_from_local.py:48:27: PLR1704 Redefining argument with the local name `b`
+redefined_argument_from_local.py:53:27: PLR1704 Redefining argument with the local name `b`
    |
-47 | def func(a, b):
-48 |     with context() as (a, b, c):
+52 | def func(a, b):
+53 |     with context() as (a, b, c):
    |                           ^ PLR1704
-49 |         print(a, b, c)
+54 |         print(a, b, c)
    |
 
-redefined_argument_from_local.py:53:24: PLR1704 Redefining argument with the local name `a`
+redefined_argument_from_local.py:58:24: PLR1704 Redefining argument with the local name `a`
    |
-52 | def func(a, b):
-53 |     with context() as [a, b, c]:
+57 | def func(a, b):
+58 |     with context() as [a, b, c]:
    |                        ^ PLR1704
-54 |         print(a, b, c)
+59 |         print(a, b, c)
    |
 
-redefined_argument_from_local.py:53:27: PLR1704 Redefining argument with the local name `b`
+redefined_argument_from_local.py:58:27: PLR1704 Redefining argument with the local name `b`
    |
-52 | def func(a, b):
-53 |     with context() as [a, b, c]:
+57 | def func(a, b):
+58 |     with context() as [a, b, c]:
    |                           ^ PLR1704
-54 |         print(a, b, c)
+59 |         print(a, b, c)
    |
 
-redefined_argument_from_local.py:58:51: PLR1704 Redefining argument with the local name `a`
+redefined_argument_from_local.py:63:51: PLR1704 Redefining argument with the local name `a`
    |
-57 | def func(a):
-58 |     with open('foo.py', ) as f, open('bar.py') as a:
+62 | def func(a):
+63 |     with open('foo.py', ) as f, open('bar.py') as a:
    |                                                   ^ PLR1704
-59 |         ...
+64 |         ...
    |
 
-redefined_argument_from_local.py:64:13: PLR1704 Redefining argument with the local name `a`
+redefined_argument_from_local.py:69:13: PLR1704 Redefining argument with the local name `a`
    |
-62 | def func(a):
-63 |     def bar(b):
-64 |         for a in range(1):
+67 | def func(a):
+68 |     def bar(b):
+69 |         for a in range(1):
    |             ^ PLR1704
-65 |             print(a)
+70 |             print(a)
    |
 
-redefined_argument_from_local.py:70:13: PLR1704 Redefining argument with the local name `b`
+redefined_argument_from_local.py:75:13: PLR1704 Redefining argument with the local name `b`
    |
-68 | def func(a):
-69 |     def bar(b):
-70 |         for b in range(1):
+73 | def func(a):
+74 |     def bar(b):
+75 |         for b in range(1):
    |             ^ PLR1704
-71 |             print(b)
+76 |             print(b)
    |
 
-redefined_argument_from_local.py:76:13: PLR1704 Redefining argument with the local name `a`
+redefined_argument_from_local.py:81:13: PLR1704 Redefining argument with the local name `a`
    |
-74 | def func(a=1):
-75 |     def bar(b=2):
-76 |         for a in range(1):
+79 | def func(a=1):
+80 |     def bar(b=2):
+81 |         for a in range(1):
    |             ^ PLR1704
-77 |             print(a)
-78 |         for b in range(1):
+82 |             print(a)
+83 |         for b in range(1):
    |
 
-redefined_argument_from_local.py:78:13: PLR1704 Redefining argument with the local name `b`
+redefined_argument_from_local.py:83:13: PLR1704 Redefining argument with the local name `b`
    |
-76 |         for a in range(1):
-77 |             print(a)
-78 |         for b in range(1):
+81 |         for a in range(1):
+82 |             print(a)
+83 |         for b in range(1):
    |             ^ PLR1704
-79 |             print(b)
+84 |             print(b)
    |
-
-