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

pkg/services/accesscontrol/models.go

@@ -309,7 +309,8 @@ const (
 	ActionServerStatsRead = "server.stats:read"
 
 	// Settings actions
-	ActionSettingsRead = "settings:read"
+	ActionSettingsRead  = "settings:read"
+	ActionSettingsWrite = "settings:write"
 
 	// Datasources actions
 	ActionDatasourcesExplore = "datasources:explore"
@@ -324,7 +325,9 @@ const (
 	ScopeUsersAll = "users:*"
 
 	// Settings scope
-	ScopeSettingsAll = "settings:*"
+	ScopeSettingsAll  = "settings:*"
+	ScopeSettingsAuth = "settings:auth:*"
+	ScopeSettingsSAML = "settings:auth.saml:*"
 
 	// Team related actions
 	ActionTeamsCreate           = "teams:create"