fix(button): mouse out

[sstrubberg]

Closes #8961
Refs #7040
Refs #4560
Refs #8022

*** DO NOT MERGE** until the MouseOut logic is removed from the Button story.

Refactored Button as it pertains to how it handles tooltips.

Changed

• In order to isolate the issue, we ended up stripping Button down of most of it's logic to get a sense of what conditionals were happening when the functions handleFocus, handleBlur, handleMouseEnter, and handleMouseLeave ran. In doing so we fairly quickly realized we didn't need the alllowTooltipVisibilty, isHovered, and isFocused states; and replaced them with simply isTooltipVisible. This took care of most of the work, but then we found that there were instances where multiple tooltips would occupy the screen simultaneously in some conditions. We ended up gutting the old closeTooltips function and replaced it with the global store for tracking and closing tooltips.

Testing / Reviewing

Open storybook and examine Button, specifically iconOnly button and the MouseOut story (the story that needs to be removed before merging the PR). Ensure the tooltips on the button fire on/off correctly with mouse and keyboard control.

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[tw15egan]

It seems like tooltips on focus are no longer appearing

I'd take a look at #8022 and ensure all use-cases are still being handled, and we'll also need to port these same changes over to TooltipIcon

[dakahn]

Added the WIP label since it seems like this one is still cookin 👍🏾