Re: Ability to reference other extensions by schema in extension scripts

The following review has been posted through the commitfest application:
make installcheck-world:  tested, failed
Implements feature:       tested, passed
Spec compliant:           tested, passed
Documentation:            tested, passed

I've applied the patch attached to message
https://www.postgresql.org/message-id/000401d94bc8%2448dff700%24da9fe500%24%40pcorp.us(md5sum
a7d45a32c054919d94cd4a26d7d07c20)onto current tip of the master branch being 128dd9f9eca0b633b51ffcd5b0f798fbc48ec4c0
 

The review written in https://www.postgresql.org/message-id/20230228224608.ak7br5shev4wic5a%40c19 all still applies.

The `make installcheck-world`  test fails for me but the failures seem unrelated to the patch (many occurrences of
"+ERROR: function pg_input_error_info(unknown, unknown) does not exist" in the regression.diff).
 

Documentation exists for the new feature

The new status of this patch is: Ready for Committer