PY-46099 Fix ClassCastException in FlaskSQLAlchemyTypeProvider

(cherry picked from commit f939dd3ae0b9811a7389c82408f8e973bf5ef2a3)

IJ-MR-5058

GitOrigin-RevId: 6b1b00fe2b7c31756a213d7729bd273095cfc9b6

python/testData/refactoring/extractsuperclass/noClassCastExceptionInCopiedFunctionWithClassInitAndMethodCall.after.py

@@ -0,0 +1,14 @@
+class Foo:
+    def foo(self):
+        pass
+
+
+class Bar:
+    @staticmethod
+    def baz():
+        foo = Foo()
+        foo.foo()
+
+
+class Baz(Bar):
+    pass

python/testData/refactoring/extractsuperclass/noClassCastExceptionInCopiedFunctionWithClassInitAndMethodCall.before.py

@@ -0,0 +1,10 @@
+class Foo:
+    def foo(self):
+        pass
+
+
+class Baz:
+    @staticmethod
+    def baz():
+        foo = Foo()
+        foo.foo()

python/testSrc/com/jetbrains/python/refactoring/classes/extractSuperclass/PyExtractSuperclassTest.java

@@ -239,4 +239,10 @@ public class PyExtractSuperclassTest extends PyClassRefactoringTest {
     String expected = psi_mgr.findFile(LocalFileSystem.getInstance().findFileByIoFile(expected_file)).getText().trim();
     assertEquals(expected, result);
   }
+
+  // PY-46099
+  public void testNoClassCastExceptionInCopiedFunctionWithClassInitAndMethodCall() {
+    runWithLanguageLevel(LanguageLevel.getLatest(),
+                         () -> doSimpleTest("Baz", "Bar", null, true, false, ".baz"));
+  }
 }