Migrate to stateless app.App (#17542)

* add request context

* move initialialization to server

* use app interface instead of global app functions

* remove app context from webconn

* cleanup

* remove duplicated services

* move context to separate package

* remove finalize init method and move content to NewServer function

* restart workers and schedulers after adding license for tests

* reflect review comments

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

api4/role.go

@@ -118,7 +118,7 @@ func patchRole(c *Context, w http.ResponseWriter, r *http.Request) {
 			requiredPermission = model.PERMISSION_MANAGE_SYSTEM
 		}
 	}
-	if !c.App.SessionHasPermissionTo(*c.App.Session(), requiredPermission) {
+	if !c.App.SessionHasPermissionTo(*c.AppContext.Session(), requiredPermission) {
 		c.SetPermissionError(requiredPermission)
 		return
 	}
@@ -172,12 +172,12 @@ func patchRole(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	if oldRole.Name == model.TEAM_ADMIN_ROLE_ID || oldRole.Name == model.CHANNEL_ADMIN_ROLE_ID || oldRole.Name == model.SYSTEM_USER_ROLE_ID || oldRole.Name == model.TEAM_USER_ROLE_ID || oldRole.Name == model.CHANNEL_USER_ROLE_ID || oldRole.Name == model.SYSTEM_GUEST_ROLE_ID || oldRole.Name == model.TEAM_GUEST_ROLE_ID || oldRole.Name == model.CHANNEL_GUEST_ROLE_ID {
-		if !c.App.SessionHasPermissionTo(*c.App.Session(), model.PERMISSION_SYSCONSOLE_WRITE_USERMANAGEMENT_PERMISSIONS) {
+		if !c.App.SessionHasPermissionTo(*c.AppContext.Session(), model.PERMISSION_SYSCONSOLE_WRITE_USERMANAGEMENT_PERMISSIONS) {
 			c.SetPermissionError(model.PERMISSION_SYSCONSOLE_WRITE_USERMANAGEMENT_PERMISSIONS)
 			return
 		}
 	} else {
-		if !c.App.SessionHasPermissionTo(*c.App.Session(), model.PERMISSION_SYSCONSOLE_WRITE_USERMANAGEMENT_SYSTEM_ROLES) {
+		if !c.App.SessionHasPermissionTo(*c.AppContext.Session(), model.PERMISSION_SYSCONSOLE_WRITE_USERMANAGEMENT_SYSTEM_ROLES) {
 			c.SetPermissionError(model.PERMISSION_SYSCONSOLE_WRITE_USERMANAGEMENT_SYSTEM_ROLES)
 			return
 		}