[ANN] U-Boot v2024.04-rc4 released

Hey all,

It's release day and so here's -rc4, and I'll be updating the next branch with this as well shortly.

In terms of a changelog, git log --merges v2024.04-rc3..v2024.04-rc4 contains what I've pulled but as always, better PR messages and tags will provide better results here.

At this point there's one more -rc before the release on April 2nd, 2024. If there are regression fixes that you know of please speak up so we can ensure they're in the release. Otherwise changes should be targetting the next branch. Thanks all!