[Feature Request]: Avatar - Handle fallback image

[vicky-comeau]

Component that this feature request involves

Avatar

Is your feature request related to a problem? Please describe

No response

Describe the solution you'd like

In OV, the avatar allows for a fallback image.
They have this hook:
const [imageUrl, handleImageError] = useUserImageFallback(src, fallbackSrc);
and they call this on the image tag:
onError={handleImageError}
It would be good to have this in igloo so that we're able to replace all avatars with our component.

Describe alternatives you've considered

No response

Additional context

No response