Reimplement tooltips using tippy.js (#18880)

* add tippy and react-is

* add tippy styles to vendor.css

we'll probably override most things but it handles
apply the triangle to tooltips

* reimplement Tooltip using tippy

* reimplement ChartTooltip using Tooltip

* add tooltip theme styling

* fix StoreLink styling

* remove TooltipPopover

* add util for easy mapping to innerRef

* use innerRef util with StoreLink target

* react-is type defs

* convert Tooltip into tsx

* convert styled-components util into typescript

* fix Tooltip fallback return

* use Tooltip in Icon over Tooltipify

* remove Tooltipify

* pass ref all the way through Icon

* fix DimensionListItem styling caused by missing ref

* fix ChartTooltip event target bug

* fix unit test by making Icon.tsx grosser

* replace popover() util with tooltip() in cy tests

* fix random broken e2e test

* improve types in Tooltip

* move everything to a separate folder + add tests

* add more examples

* rmv accidental deps

* fix run button styling

* add Link tooltip prop to avoid tooltip on icon

* wrap MetabotLogo in forwardRef

* support reduced motion

* remove flow type from dom.js so we can use in ts files

* pass isEnabled prop to tippy's disabled prop

once you've activated "control mode" in tippy you can't turn it off so
using "visible" as a toggle doesn't work. instead, use disabled.

* fix uncentered tooltip the right way

tippy includes padding/margin in its centering calculations, unlike
tether, so we will need to be careful about adding one-sides
padding/margins to a tooltip target, otherwise the tooltip will appear
offcenter

* workaround for absolutely positioned element

the tooltip appeared on the far end of the target because of a child div
that is absolutely positioned. quick fix is to instead target the icon

* fix positioning of HintIcon tooltip

* lint fix

* add placement prop

* fix styled component tooltip target styling

* place QuestionNotebookButton tooltip below

* Make the NativeQueryButton an actual button

* set tooltip placement to bottom

* lint fix warning