itsol, salt: move to homebrew/science

Closes #34777.
carthage 0.4 (new formula)

A work-in-progress for Carthage 0.4 when it is released. Using my fork
until my Makefile changes (or something similar) end up upstream.

Currently the test is failing. It shouldn't be so I'll need to look at
that.
carthage: add 0.4.pre1 bottle.