AuthProxy: Allow disabling Auth Proxy cache (#83755)

* extract auth proxy settings

* simplify auth proxy methods

* add doc mentions

pkg/services/authn/authnimpl/service.go

@@ -122,7 +122,7 @@ func ProvideService(
 		}
 	}
 
-	if s.cfg.AuthProxyEnabled && len(proxyClients) > 0 {
+	if s.cfg.AuthProxy.Enabled && len(proxyClients) > 0 {
 		proxy, err := clients.ProvideProxy(cfg, cache, proxyClients...)
 		if err != nil {
 			s.log.Error("Failed to configure auth proxy", "err", err)

pkg/services/authn/authnimpl/usage_stats.go

@@ -13,7 +13,7 @@ func (s *Service) getUsageStats(ctx context.Context) (map[string]any, error) {
 	authTypes := map[string]bool{}
 	authTypes["basic_auth"] = s.cfg.BasicAuthEnabled
 	authTypes["ldap"] = s.cfg.LDAPAuthEnabled
-	authTypes["auth_proxy"] = s.cfg.AuthProxyEnabled
+	authTypes["auth_proxy"] = s.cfg.AuthProxy.Enabled
 	authTypes["anonymous"] = s.cfg.AnonymousEnabled
 	authTypes["jwt"] = s.cfg.JWTAuth.Enabled
 	authTypes["grafana_password"] = !s.cfg.DisableLogin

pkg/services/authn/authnimpl/usage_stats_test.go

@@ -20,7 +20,7 @@ func TestService_getUsageStats(t *testing.T) {
 	svc.cfg.DisableLoginForm = false
 	svc.cfg.DisableLogin = false
 	svc.cfg.BasicAuthEnabled = true
-	svc.cfg.AuthProxyEnabled = true
+	svc.cfg.AuthProxy.Enabled = true
 	svc.cfg.JWTAuth.Enabled = true
 	svc.cfg.LDAPAuthEnabled = true
 	svc.cfg.EditorsCanAdmin = true