pgsql: Harmonize some more function parameter names.

Harmonize some more function parameter names.

Make sure that function declarations use names that exactly match the
corresponding names from function definitions in a few places.  These
inconsistencies were all introduced relatively recently, after the code
base had parameter name mismatches fixed in bulk (see commits starting
with commits 4274dc22 and 035ce1fe).

pg_bsd_indent still has a couple of similar inconsistencies, which I
(pgeoghegan) have left untouched for now.

Like all earlier commits that cleaned up function parameter names, this
commit was written with help from clang-tidy.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/d6f0f95a6bb7fa43731c6db83226a3c574041659

Modified Files
--------------
src/backend/parser/parse_expr.c            |  2 +-
src/backend/storage/buffer/bufmgr.c        |  4 ++--
src/backend/utils/activity/pgstat_io.c     | 10 +++++-----
src/backend/utils/adt/pg_locale.c          |  2 +-
src/bin/pg_dump/pg_dump.c                  |  2 +-
src/include/pgstat.h                       |  4 ++--
src/include/replication/worker_internal.h  |  2 +-
src/include/storage/buf_internals.h        |  2 +-
src/pl/plpython/plpy_resultobject.c        |  2 +-
src/test/modules/test_shm_mq/test_shm_mq.h |  2 +-
src/test/modules/worker_spi/worker_spi.c   |  2 +-
11 files changed, 17 insertions(+), 17 deletions(-)