Rebuild `Avatar` component

[mannycarrera4]

💡 Suggestion

Avatar is still a class component which means we sometimes don't have typescript play nicely when we try to use this component as a sub component of another component. If we refactor this to use our createComponent function we'll get a lot of the typing that can allows us to omit props like altText or default the element to a div when needed.

• [ ] Convert Avatar to a compound component.
• [ ] Update Avatar to use our new style utils and CSS variable tokens

[RayRedGoose]

It seems like popper use forwardRef to create component too.

[myvuuu]

Closing this out, Avatar does not need to be a compound component. The remaining work for restyling is a duplicate for canvas-kit #2779