Add AioUringCompletion in wait_event_names.txt and a safeguard in generate-wait_event_types.pl

Hi hackers,

c325a7633fcb forgot to add AioUringCompletion in wait_event_names.txt: please
find attached v1-0001 fixing it (please double check the wait event description
as I'm not that familiar with io_uring).

042a66291 also missed it for LWTRANCHE_MEMORY_CONTEXT_REPORTING_PROC and
LWTRANCHE_MEMORY_CONTEXT_REPORTING_STATE. 042a66291 has been reverted in
fb844b9f065 though so there is no need to fix those.

That makes me think that it is easy to miss adding a new LWLock in
wait_event_names.txt and generate-wait_event_types.pl does not detect that.

So, adding validate_lwlock_count() in generate-wait_event_types.pl
(in v1-0002) to ensure that the number of LWLocks description generated in the
documentation match the ones defined in lwlock.h and lwlocklist.h.

Looking forward to your feedback,

Regards,

-- 
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com