Extension custom scripts are not run for extensions not in privileged_extensions #146
Description
Bug report
Describe the bug
privileged_extensions_custom_scripts is a misnomer; from the name it sounds like it only applies for extensions in privileged_extensions, but in practice we also use it for pgmq as well as TLEs, which are not included in privileged_extensions.
This confusion led to a change in behavior in this refactor PR which made custom scripts only run for privileged_extensions. But there's no reason to impose this limitation since custom scripts are completely under our control.
To Reproduce
See the check failure here; observe that pgmq's after-create script is not run.
Expected behavior
PR above should not have diffs in snapshots