info-overview: show BUILD_ID in separate row

Previously, if os-release included the BUILD_ID field, it was smushed
into the OS Name row as follows:

    OS Name                    Endless OS 5.0.0; Build ID: 220810-230009

This is unsightly in English; and in languages where the translations of
"OS Name" and "Build ID" are long, the build ID may be ellipsised and
hence useless:

    Nom du système   Endless OS 5.0.0 ; (identifiant de construction ...
    d'exploitation

Instead, display the build ID in a separate row, and hide it if not
present.

Fixes: https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/1347