feat(alerts): Allow test notifications to include titles (#87871)

Some notifications may change their content depending on the title of
the alert. This is the case for PagerDuty as per the change in
#87786. For users to better
understand what they can expect when using the test notification button,
if they've set up an alert name we should use it, that way it'll appear
in the test notification as well.

If the user is setting up an issue alert for the first time, the test
notification will use the label `Test Alert` (per the change here
#87786 -- not included in this
PR)

Author: leeandher

static/app/views/alerts/rules/issue/index.spec.tsx

@@ -193,6 +193,30 @@ describe('IssueRuleEditor', function () {
       expect(await screen.findByLabelText('Save Rule')).toBeEnabled();
       expect(screen.queryByTestId('project-permission-alert')).not.toBeInTheDocument();
     });
+
+    it('allows test notifications', async () => {
+      const {organization, project} = createWrapper();
+      const mockTestNotification = MockApiClient.addMockResponse({
+        url: `/projects/${organization.slug}/${project.slug}/rule-actions/`,
+        method: 'POST',
+        body: {},
+      });
+      await userEvent.click(screen.getByText('Send Test Notification'));
+      expect(mockTestNotification).toHaveBeenCalledWith(
+        `/projects/${organization.slug}/${project.slug}/rule-actions/`,
+        expect.objectContaining({
+          data: {
+            actions: [
+              {
+                id: 'sentry.rules.actions.notify_event.NotifyEventAction',
+                name: 'Send a notification (for all legacy integrations)',
+              },
+            ],
+            name: 'My alert rule',
+          },
+        })
+      );
+    });
   });
 
   describe('Edit Rule', function () {

static/app/views/alerts/rules/issue/index.tsx

@@ -433,6 +433,7 @@ class IssueRuleEditor extends DeprecatedAsyncComponent<Props, State> {
         method: 'POST',
         data: {
           actions: rule?.actions ?? [],
+          name: rule?.name,
         },
       })
       .then(() => {