feat(s2): Add triggerRef prop to S2 Popover (#8257)
* Added triggerRef to s2 popover
* Refactor Popover component to use isOpen and onOpenChange props, removing deprecated button handling logic. Update stories to demonstrate new trigger functionality.
* Update PopoverDialogProps to include triggerRef, isOpen, and onOpenChange properties for improved prop management.
* Refactor import statements in Popover component and stories for consistency and clarity.
* Make example a bit prettier
---------
Co-authored-by: sbiswari <sbiswari@adobe.com>
Co-authored-by: biswarisomya <102928682+biswarisomya@users.noreply.github.com>