net/rsync: revert to single package without Python dependency

Restore the previous setup with a single net/rsync package that includes
the rrsync script but does not depend on Python.

Users who require the rrsync script must install Python separately,
as indicated in the install message.

Bump PORTREVISION

This reverts commit fc42790ae011acedf0195c7d31b1cf63b8c02155.
This reverts commit f02bc3be718072b75bd291f81f66b7f15865f535.

PR: 286073