Fix StackBlitz Popovers and Tooltips examples

Step 2 of https://github.com/twbs/bootstrap/issues/36391

This PR contains

• New stackblitz option for the example shortcode
• Rename js_snippet to stackblitz_add_js option for the example shortcode in order to identify easily what's related to StackBlitz
• Rewrite the example shortcode's documentation and reorder the options
• Hide the StackBlitz edit button of the first Popover example and use data-bs-title instead of title for the other Popover examples as discussed in https://github.com/twbs/bootstrap/pull/36127#discussion_r864266702
• ⚠ Use data-bs-title instead of title for the Tooltip and Popover examples

Live previews

Popovers

• Live Demo.
• Custom popovers: popover's title is now displayed in StackBlitz but without the custom style (will be handled in another PR in step 3).
• Dismiss on next click

Tooltips

• Tooltips on links
• Custom tooltips: displayed in StackBlitz but without the custom style (will be handled in another PR in step 3).