Update base packages for apertium to latest stable upstream releases and backport them to stable release, so it can be used by apertium service in WMF. Newer language pairs requires these packages as dependencies. Packages requires to be available in `testing` before they can be ready for backport.
* [] cg3
** [x] Debian
** [] Backport
* [] lttoolbox
** [x] Debian
** [] Backport
* [] apertium-anaphora
** [x] Debian
** [] Backport
* [] apertium-get (New) [Depends on T247585]
** [x] ITP: https://bugs.debian.org/977800
** [x] Debian
** [] Backport
* [] apertium-lex-tools [Depends on T247585]
** [x] Debian
** [] Backport
* [] apertium-recursive [Depends on T247585]
** [x] Debian
** [] Backport
* [] apertium-separable [Depends on T247585]
** [x] Debian
** [] Backport
* [] Deployment in apertium service.