Add regression test

Author: zenlyj

tests/functional/i/invalid/invalid_name/invalid_name_issue_10525.py

@@ -0,0 +1,24 @@
+"""Regression test for https://github.com/pylint-dev/pylint/issues/10525."""
+
+# pylint: disable=too-few-public-methods
+
+from typing import ClassVar
+
+import attrs
+
+
+class X:
+    """Class without attrs decorator"""
+
+    A: ClassVar[int] = 1
+
+    def __init__(self) -> None:
+        self.b: int = 2
+
+
+@attrs.define
+class Y:
+    """Class with attrs decorator"""
+
+    A: ClassVar[int] = 1  # should not trigger `invalid-name`
+    b: int = 2