PY-22507 Fixed: False positive: parameters unfilled after the isinstance check for datetime.date.timetuple

Add test. Issue was fixed after enabling pyi-stubs for datetime module.

python/testData/inspections/PyArgumentListInspection/TimetupleOnAssertedDate/_datetime.py

@@ -0,0 +1,3 @@
+class date:
+    def timetuple(self):
+        pass

python/testData/inspections/PyArgumentListInspection/TimetupleOnAssertedDate/b.py

@@ -0,0 +1,6 @@
+from datetime import date
+
+
+def foo(my_date):
+    if isinstance(my_date, date):
+        my_date.timetuple()

python/testData/inspections/PyArgumentListInspection/TimetupleOnAssertedDate/datetime.py

@@ -0,0 +1,8 @@
+class date:
+    def timetuple(self):
+        pass
+
+try:
+    from _datetime import *
+except:
+    pass

python/testSrc/com/jetbrains/python/inspections/PyArgumentListInspectionTest.java

@@ -258,6 +258,11 @@ public class PyArgumentListInspectionTest extends PyTestCase {
     doTest();
   }
 
+  // PY-22507
+  public void testTimetupleOnAssertedDate() {
+    doMultiFileTest();
+  }
+
   private void doMultiFileTest() {
     final String folderPath = "inspections/PyArgumentListInspection/" + getTestName(false) + "/";