Removing all FakeApp usages (#14174)

* Removing some other fake apps

* More FakeApp removed

* Removing entirely FakeApp

* Fixing some tests

* Fixing get Cluster id from get plugin status

* Fixing failing tests

* Fixing tests

* Fixing test initialization for web

* Fixing InitServer for server tests

* Fixing InitServer for server tests

* Reverting go.sum and go.mod

* Removing unneded HTMLTemplates function in App layer

* Moving back some functions to its old place to easy the review

* Moving back some functions to its old place to easy the review

* Using the last struct2interface version

* Generating store layers

* Fixing merge problems

* Addressing PR comments

* Small fix

* Fixing app tests build

* Fixing tests

* fixing tests

* Fix tests

* Fixing tests

* Fixing tests

* Fixing tests

* Moving license to server struct

* Adding some fixes to the test compilation

* Fixing cluster and some jobs initialization

* Fixing some license tests compilation problems

* Fixing recursive cache invalidation

* Regenerating app layers

* Fix test compilation

Co-authored-by: mattermod <mattermod@users.noreply.github.com>

api4/post.go

@@ -682,7 +682,7 @@ func saveIsPinnedPost(c *Context, w http.ResponseWriter, r *http.Request, isPinn
 		return
 	}
 
-	if c.App.License() != nil &&
+	if c.App.Srv().License() != nil &&
 		*c.App.Config().TeamSettings.ExperimentalTownSquareIsReadOnly &&
 		channel.Name == model.DEFAULT_CHANNEL &&
 		!c.App.RolesGrantPermission(user.GetRoles(), model.PERMISSION_MANAGE_SYSTEM.Id) {