SAML: Configuration UI (#64054)

* Add initial authentication config page skeleton

* Add initial SAML config page WIP

* Add few more pages

* Add connect to IdP page

* Assertion mappings page stub and url params

* Able to save settings

* Some tweaks for authentication page

* Tweak behaviour

* Tweak provider name

* Move SAML config pages to enterprise

* minor refactor

* Able to reset settings

* Configure key and cert from UI

* Refactor WIP

* Tweak styles

* Optional save button

* Some tweaks for the page

* Don't show info popup when save settings

* Improve key/cert validation

* Fetch provider status and display on auth page

* Add settings list to the auth page

* Show call to action card if no auth configured

* clean up

* Show authentication page only if SAML available

* Add access control for SSO config page

* Add feature toggle for auth config UI

* Add code owners for auth config page

* Auth config UI disabled by default

* Fix feature toggle check

* Apply suggestions from review

* Refactor: use forms for steps

* Clean up

* Improve authentication page loading

* Fix CTA link

* Minor tweaks

* Fix page route

* Fix formatting

* Fix generated code formatting

public/app/routes/routes.tsx

@@ -313,6 +313,14 @@ export function getAppRoutes(): RouteDescriptor[] {
       component: SafeDynamicImport(() => import(/* webpackChunkName: "TeamPages" */ 'app/features/teams/TeamPages')),
     },
     // ADMIN
+    {
+      path: '/admin/authentication',
+      component: config.featureToggles.authenticationConfigUI
+        ? SafeDynamicImport(
+            () => import(/* webpackChunkName: "AdminAuthentication" */ 'app/features/auth-config/AuthConfigPage')
+          )
+        : () => <Redirect to="/admin" />,
+    },
     {
       path: '/admin',
       component: () => (config.featureToggles.topnav ? <NavLandingPage navId="cfg" /> : <Redirect to="/admin/users" />),