[FIX] project: hide the translation alert on sharing view

Currently, the translation banner is displayed inside the project
sharing view.

So in this commit hide the translation alert on sharing view of
the task.

task-3052597

X-original-commit: b39a5e4a1f074a53bf0bd0831b73564f52757d6e
Part-of: odoo/odoo#108440

addons/project/static/src/project_sharing/views/form/project_sharing_form_controller.js

@@ -24,6 +24,10 @@ export class ProjectSharingFormController extends FormController {
     get actionMenuItems() {
         return {};
     }
+
+    get translateAlert() {
+        return null;
+    }
 }
 
 ProjectSharingFormController.components = {