Use python 3.12 and 3.13 flag, Final can be inside ClassVar after py 3.13

Author: triumph1

mypy/typeanal.py

@@ -605,7 +605,7 @@ def try_analyze_special_unbound_type(self, t: UnboundType, fullname: str) -> Typ
                     t,
                     code=codes.VALID_TYPE,
                 )
-            else:
+            elif self.options.python_version < (3, 13):
                 self.fail(
                     "Final can be only used as an outermost qualifier in a variable annotation",
                     t,

test-data/unit/check-final.test

@@ -1128,13 +1128,23 @@ class A:
 [builtins fixtures/tuple.pyi]
 
 [case testFinalUsedWithClassVar]
+# flags: --python-version 3.12
 from typing import Final, ClassVar
 
 class A:
     a: Final[ClassVar[int]]  # E: Variable should not be annotated with both ClassVar and Final
     b: ClassVar[Final[int]]  # E: Final can be only used as an outermost qualifier in a variable annotation
     c: ClassVar[Final] = 1  # E: Final can be only used as an outermost qualifier in a variable annotation
-[out version<3.13]
+[out]
+
+[case testFinalUsedWithClassVarAfterPy313]
+# flags: --python-version 3.13
+from typing import Final, ClassVar
+
+class A:
+    a: Final[ClassVar[int]] = 1
+    b: ClassVar[Final[int]] = 1
+    c: ClassVar[Final] = 1
 
 [case testFinalClassWithAbstractMethod]
 from typing import final