Allow sunder names from enum.Enum (#7987)

Closes #7971.

Author: charliermarsh

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

@@ -63,6 +63,11 @@ def __attrs_init__(self):
     def __html__(self):
         pass
 
+    # Allow _missing_, used by enum.Enum.
+    @classmethod
+    def _missing_(cls, value):
+        pass
+
 
 def __foo_bar__():  # this is not checked by the [bad-dunder-name] rule
     ...

crates/ruff_linter/src/rules/pylint/rules/bad_dunder_method_name.rs

@@ -196,5 +196,13 @@ fn is_known_dunder_method(method: &str) -> bool {
             | "__trunc__"
             | "__weakref__"
             | "__xor__"
+            // Overridable sunder names from the `Enum` class.
+            // See: https://docs.python.org/3/library/enum.html#supported-sunder-names
+            | "_name_"
+            | "_value_"
+            | "_missing_"
+            | "_ignore_"
+            | "_order_"
+            | "_generate_next_value_"
     )
 }