Add invite realtime update to get started page

What does this MR do and why?

Additions

• adds realtime update once invite is finished to mark the task, progress bar and sidebar percentage as update
• adds invite success alert

Fixes

• sidebar realtime update for learn gitlab sidebar fixed

  • Fix super sidebar update for learn gitlab when ... (!133495 - merged) was original feature
  • Unselected advanced search facets not loading a... (!134401 - merged) caused a regression
  • this restores that functionality for learn gitlab and adds for get started with enhanced tests to ensure we don't risk regression again.

• resolves a few rubocop exceptions in related files

• see https://gitlab.com/gitlab-org/gitlab/-/issues/537653 and specifically https://gitlab.com/gitlab-org/gitlab/-/work_items/540437

Screenshots or screen recordings

invite alert	invite alert mobile	invite video
		Screen_Recording_2025-05-08_at_1.03.22_PM

How to set up and validate locally

1. Setup gdk to simulate SaaS - https://docs.gitlab.com/ee/development/ee_features.html#simulate-a-saas-instance and restart GDK
2. In rails console enable the feature flag

   Feature.enable(:learn_gitlab_redesign)

3. Create a new group and project.
4. In rails console, onboard that group that was just created

   ::Onboarding::Progress.onboard(Group.last)

5. In the gitlab admin UI, edit the group to be on an ultimate trial plan(edit button from http://gdk.test:3000/admin/groups)
6. In rails console(bundle exec rails c), change the trial, trial start and end date for the group

   Group.last.gitlab_subscription.update_columns(trial_starts_on: Date.today, trial_ends_on: 30.days.from_now, trial: true)

7. Go to the get started path for the group/project: For instance, http://gdk.test:3000/logan225-group/logan225-project/-/get_started
8. Expand Configure a project
9. Click Invite your colleagues and invite a user.

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #537653