[python] Add missing tests on resolving forward references from new-style type alias

(cherry picked from commit ab9b688a7463b61ca262ec679781fb314ed74e8e)

IJ-CR-175817

GitOrigin-RevId: 1a60bc32362d143ff99b6cf71f7d2d28bef5c02c

python/python-common-tests/com/jetbrains/python/PyCommonResolveTest.java

@@ -1414,6 +1414,14 @@ public abstract class PyCommonResolveTest extends PyCommonResolveTestCase {
     );
   }
 
+  public void testTopLevelNewStyleTypeAliasForwardReference() {
+    assertResolvesTo(PyClass.class, "MyClass");
+  }
+
+  public void testClassLevelNewStyleTypeAliasForwardReference() {
+    assertResolvesTo(PyClass.class, "MyClass");
+  }
+
   // PY-19890
   public void testUnboundVariableOnClassLevelDeclaredBelowAsTarget() {
     final PyTargetExpression foo = assertResolvesTo(PyTargetExpression.class, "foo");

python/testData/resolve/ClassLevelNewStyleTypeAliasForwardReference.py

@@ -0,0 +1,6 @@
+class C:
+    type Alias = list[MyClass]
+    #                    <ref>
+
+class MyClass:
+    pass

python/testData/resolve/TopLevelNewStyleTypeAliasForwardReference.py

@@ -0,0 +1,5 @@
+type Alias = list[MyClass]
+#                    <ref>
+
+class MyClass:
+    pass