... and similar imports of modules in the package, found via

find src/sage -name '__init__.py' | xargs grep import

Possibly some of them are needed to break circular imports, but likely not all of them.

Part of #32501.

Depends on #32506

CC: @tscrim @fchapoton

Component: refactoring

Author: Matthias Koeppe

Branch/Commit: 55ca4bc

Reviewer: Frédéric Chapoton

Issue created by migration from https://trac.sagemath.org/ticket/32507