Let web and API routes have different auth methods group (#19168)

* remove the global methods but create dynamiclly

* Fix lint

* Fix windows lint

* Fix windows lint

* some improvements

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/api/v1/auth_windows.go

@@ -0,0 +1,20 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package v1
+
+import (
+	"code.gitea.io/gitea/models/auth"
+	auth_service "code.gitea.io/gitea/services/auth"
+)
+
+// specialAdd registers the SSPI auth method as the last method in the list.
+// The SSPI plugin is expected to be executed last, as it returns 401 status code if negotiation
+// fails (or if negotiation should continue), which would prevent other authentication methods
+// to execute at all.
+func specialAdd(group *auth_service.Group) {
+	if auth.IsSSPIEnabled() {
+		group.Add(&auth_service.SSPI{})
+	}
+}