optimize loading questions only for active tab (#31578)

* only load cards and metadata for current dashboard tab

* add e2e test

* refactor

* more refactoring

* fix filters not working

* update e2e test

* fix bug with x-rays

* add dashboard_tab_id to automagic-dashboard response

* use schema check instead

* fix on public dashboards

* remove FE x-ray fix now that BE is fixed

* add test for public dashboards

* fix duplicate request for public dashboards

* fix notification bug

* fix failing unit tests in `reducers.unit.spec.js`

---------

Co-authored-by: Ngoc Khuat <qn.khuat@gmail.com>