Use new stories flexibility to improve components examples

Problem/Motivation

Use new stories flexibility to improve components examples by reproducing the same examples as the Bootstrap documentation which was not possible before due to need of different combination of props and slots in preview.

But first, ensure stories look the same as UIP1 with #3485906: Restore the UIP1 preview templates. Remove create_attribute calls when not needed. Fix PHP notice. Fix Components library.

DONE:

• accordion
• alert
• badge
• blockquote
• breadcrumb
• button
• button group
• button toolbar
• card
• card group
• card overlay
• carousel
• close button
• dropdown
• figure
• grid row
• list
• list group
• modal
• nav
• navbar
• navbar nav
• offcanvas
• pagination
• progress/progress stacked
• spinner
• table
• toast/toast container

Create change records when MR will be validated.