Fix table keyboard navigation bugs (#1993)
* fixing Tab/shift tab behavior for table
* fixing option/alt+tabbing in table
* updating comment
* fixing lint
* adding test for option + tab focus movement
* preventing option + tab from moving focus in Table
* simplifying fix for shift tabbing into TableView
seems to work if we switch to scrollToItem from TableView instead of always using Virtualizer.scrolltoItem
* adding aria labels
