Integrate Revisions with Reusable Blocks

[stevejburge]

The WordPress core reusable blocks track revisions across changes, but I don't see a way to schedule a revision with PublishPress like we can with posts, pages, etc. Since we heavily rely on PublishPress Revisions for our workflow, this makes reusable blocks not very helpful for us.

[KratosGemini]

I believe this is a duplicate of #1118.