Fixed #34622 -- Improved accessibility of related widget wrapper in admin.

This improves accessibility for screen reader users by adding
"aria-disabled" and removing "alt".

Thanks Thibaud Colas for the report.

tests/admin_views/test_related_object_lookups.py

@@ -0,0 +1,76 @@
+from django.contrib.admin.tests import AdminSeleniumTestCase
+from django.contrib.auth.models import User
+from django.test import override_settings
+from django.urls import reverse
+
+
+@override_settings(ROOT_URLCONF="admin_views.urls")
+class SeleniumTests(AdminSeleniumTestCase):
+    available_apps = ["admin_views"] + AdminSeleniumTestCase.available_apps
+
+    def setUp(self):
+        self.superuser = User.objects.create_superuser(
+            username="super", password="secret", email="super@example.com"
+        )
+        self.admin_login(
+            username="super", password="secret", login_url=reverse("admin:index")
+        )
+
+    def test_related_object_link_images_empty_alt(self):
+        from selenium.webdriver.common.by import By
+
+        album_add_url = reverse("admin:admin_views_album_add")
+        self.selenium.get(self.live_server_url + album_add_url)
+
+        tests = [
+            "add_id_owner",
+            "change_id_owner",
+            "delete_id_owner",
+            "view_id_owner",
+        ]
+        for link_id in tests:
+            with self.subTest(link_id):
+                link_image = self.selenium.find_element(
+                    By.XPATH, f'//*[@id="{link_id}"]/img'
+                )
+                self.assertEqual(link_image.get_attribute("alt"), "")
+
+    def test_related_object_lookup_link_initial_state(self):
+        from selenium.webdriver.common.by import By
+
+        album_add_url = reverse("admin:admin_views_album_add")
+        self.selenium.get(self.live_server_url + album_add_url)
+
+        tests = [
+            "change_id_owner",
+            "delete_id_owner",
+            "view_id_owner",
+        ]
+        for link_id in tests:
+            with self.subTest(link_id):
+                link = self.selenium.find_element(By.XPATH, f'//*[@id="{link_id}"]')
+                self.assertEqual(link.get_attribute("aria-disabled"), "true")
+
+    def test_related_object_lookup_link_enabled(self):
+        from selenium.webdriver.common.by import By
+        from selenium.webdriver.support.select import Select
+
+        album_add_url = reverse("admin:admin_views_album_add")
+        self.selenium.get(self.live_server_url + album_add_url)
+
+        select_element = self.selenium.find_element(By.XPATH, '//*[@id="id_owner"]')
+        option = Select(select_element).options[-1]
+        self.assertEqual(option.text, "super")
+        select_element.click()
+        option.click()
+
+        tests = [
+            "add_id_owner",
+            "change_id_owner",
+            "delete_id_owner",
+            "view_id_owner",
+        ]
+        for link_id in tests:
+            with self.subTest(link_id):
+                link = self.selenium.find_element(By.XPATH, f'//*[@id="{link_id}"]')
+                self.assertIsNone(link.get_attribute("aria-disabled"))