Revamp tabs & follow ARIA 1.1 practices (#33079)

Revamp tabs & follow ARIA 1.1 practices  (#33079)

* Tab: Revamp tab.js & add support Aria features

* Tab: Add tab support, just to keep backwards compatibility. Better to remove it on v6

* Revert "Tab: Add tab support, just to keep backwards compatibility. Better to remove it on v6"

* Support arrow down/up functionality

* add prevent default to avoid scrolling the page during up/down keys handling

* remove panel tabindex handling

* Expand documentation text for JS plugin

* Rearrange new docs to specifically call out a11y

* properly place section

Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Patrick H. Lauke <redux@splintered.co.uk>
Co-authored-by: Mark Otto <markdotto@gmail.com>