devel/glib20 and devel/gobject-introspection: update to 2.82.4 and 1.82.0

Changelogs:

• https://gitlab.gnome.org/GNOME/glib/-/blob/glib-2-82/NEWS
• https://gitlab.gnome.org/GNOME/gobject-introspection/-/blob/gnome-47/NEWS

PR: 281083
Reviewed by: jhale, fluffy
Differential Revision: https://reviews.freebsd.org/D47139
Exp-run by: antoine
Co-authored-by: arrowd