enable passing serve tests on windows (ray-project#21107)

* enable passing serve tests on windows

* move test_handle to 'medium' and enable'

* move test_cli to 'medium'

ci/travis/ci.sh

@@ -140,12 +140,6 @@ test_python() {
       python/ray/serve/...
       python/ray/tests/...
       -python/ray/serve:conda_env # runtime_env unsupported on Windows
-      -python/ray/serve:test_api # segfault on windows? https://github.com/ray-project/ray/issues/12541
-      -python/ray/serve:test_cli # cli
-      -python/ray/serve:test_router # timeout
-      -python/ray/serve:test_handle # "fatal error" (?) https://github.com/ray-project/ray/pull/13695
-      -python/ray/serve:test_controller_crashes # timeout
-      -python/ray/serve:test_standalone # timeout
       -python/ray/tests:test_actor_advanced # timeout
       -python/ray/tests:test_actor_failures # flaky
       -python/ray/tests:test_autoscaler # We don't support Autoscaler on Windows

python/ray/serve/BUILD

@@ -157,7 +157,7 @@ py_test(
 
 py_test(
     name = "test_handle",
-    size = "small",
+    size = "medium",
     srcs = serve_tests_srcs,
     tags = ["exclusive", "team:serve"],
     deps = [":serve_lib"],