Alerting: Fix contact points tab visibility when user can only create (#106735)

Contact points tab was not being displayed for users with only
`alert.notifications.receivers:create` and
not `alert.notifications.receivers:read`

public/app/features/alerting/unified/components/contact-points/ContactPoints.test.tsx

@@ -154,6 +154,20 @@ describe('contact points', () => {
 
         expect(await screen.findByText(/create contact point/i)).toBeInTheDocument();
       });
+
+      test('defaults to contact points tab if user has only read permission', async () => {
+        grantUserPermissions([AccessControlAction.AlertingReceiversRead]);
+        renderWithProvider(<ContactPointsPageContents />);
+
+        expect(await screen.findByText(/create contact point/i)).toBeInTheDocument();
+      });
+
+      test('defaults to contact points tab if user has only create permission', async () => {
+        grantUserPermissions([AccessControlAction.AlertingReceiversCreate]);
+        renderWithProvider(<ContactPointsPageContents />);
+
+        expect(await screen.findByText(/create contact point/i)).toBeInTheDocument();
+      });
     });
 
     describe('templates tab', () => {

public/app/features/alerting/unified/components/contact-points/ContactPoints.tsx

@@ -196,9 +196,12 @@ const useTabQueryParam = (defaultTab: ActiveTab) => {
 
 export const ContactPointsPageContents = () => {
   const { selectedAlertmanager } = useAlertmanager();
-  const [, showContactPointsTab] = useAlertmanagerAbility(AlertmanagerAction.ViewContactPoint);
+  const [, canViewContactPoints] = useAlertmanagerAbility(AlertmanagerAction.ViewContactPoint);
+  const [, canCreateContactPoints] = useAlertmanagerAbility(AlertmanagerAction.CreateContactPoint);
   const [, showTemplatesTab] = useAlertmanagerAbility(AlertmanagerAction.ViewNotificationTemplate);
 
+  const showContactPointsTab = canViewContactPoints || canCreateContactPoints;
+
   // Depending on permissions, user may not have access to all tabs,
   // but we can default to picking the first one that they definitely _do_ have access to
   const defaultTab = [