Michael Catanzaro authored Feb 20, 2023 and Philip Withnall committed Jul 21, 2023

Following Emmanuele's instructions for use of introspection annotations:

https://www.bassi.io/articles/2023/02/20/bindable-api-2023/

I have audited all uses of the (closure) annotation in glib and
determined that only a handful are correct. This commit changes almost
all of our use of (closure) annotations to conform to Emmanuele's rules.