Revert "Drop back to Glib 2.32 in configure.ac"

This reverts commit d1381afe0285c1fb4dabb2ccf3ad496efab9f3ff.
Revert "Add back Glib 2.32 support"

This reverts commit ddc4152abebd61f14055dec8c2f7c4c1e0d2ddd0.