pgsql: Revert: Implement pg_wal_replay_wait() stored procedure

Revert: Implement pg_wal_replay_wait() stored procedure

This commit reverts 06c418e163, e37662f221, bf1e650806, 25f42429e2,
ee79928441, and 74eaf66f98 per review by Heikki Linnakangas.

Discussion: https://postgr.es/m/b155606b-e744-4218-bda5-29379779da1a%40iki.fi

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/772faafca1b288c4dd66b7150a7831c27b768003

Modified Files
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doc/src/sgml/func.sgml | 113 --------
src/backend/access/transam/xact.c | 6 -
src/backend/access/transam/xlog.c | 7 -
src/backend/access/transam/xlogrecovery.c | 11 -
src/backend/catalog/system_functions.sql | 3 -
src/backend/commands/Makefile | 3 +-
src/backend/commands/meson.build | 1 -
src/backend/commands/waitlsn.c | 337 ------------------------
src/backend/lib/pairingheap.c | 18 +-
src/backend/storage/ipc/ipci.c | 3 -
src/backend/storage/lmgr/proc.c | 6 -
src/backend/utils/activity/wait_event_names.txt | 2 -
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_proc.dat | 5 -
src/include/commands/waitlsn.h | 77 ------
src/include/lib/pairingheap.h | 3 -
src/include/storage/lwlocklist.h | 1 -
src/test/recovery/meson.build | 1 -
src/test/recovery/t/043_wal_replay_wait.pl | 97 -------
src/tools/pgindent/typedefs.list | 2 -
20 files changed, 4 insertions(+), 694 deletions(-)