Move internal lints to their own crate
This makes it so switching the internal feature on/off no longer rebuilds clippy_lints.
r? @flip1995
changelog: none
:umbrella: The latest upstream changes (presumably #13225) made this pull request unmergeable. Please resolve the merge conflicts.
Marking this as blocked on #13221
r? rust-lang/clippy
This was simplified a bit by #13221.
:umbrella: The latest upstream changes (presumably #13343) made this pull request unmergeable. Please resolve the merge conflicts.
:umbrella: The latest upstream changes (possibly d28d2344d000aa96bef729cf408731f952f71fb0) made this pull request unmergeable. Please resolve the merge conflicts.
@rustbot ready
Just removed the reference from the book. internal since it doesn't fit anymore nor are they common enough to really warrant making them easier.