Login Animation: Add Dark mode variant

[loganmurray-infor]

My team has been making extensive use of this animation to make our apps really stand out, but we find ourselves in need of a dark mode variant that looks good on a dark background. The Lottie format seems intentionally hard to edit by hand; and we don't have anyone with a licensed editor to make the change.

[inforandy]

https://inforwiki.atlassian.net/browse/IDS-2747 design task here for record