pgsql: Rename SLRU elements in view pg_stat_slru

Rename SLRU elements in view pg_stat_slru

The new names are intended to match those in an upcoming patch that adds
a few GUCs to configure the SLRU buffer sizes.

Backwards compatibility concern: this changes the accepted names for
function pg_stat_slru_rest(). Since this function recognizes "any other
string" as a request to reset the entry for "other", this means that
calling it with the old names would silently reset "other" instead of
doing nothing or throwing an error.

Reviewed-by: Andrey M. Borodin <x4mmm(at)yandex-team(dot)ru>
Discussion: https://postgr.es/m/202402261616.dlriae7b6emv@alvherre.pgsql

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/bcdfa5f2e2f274caeed20b2f986012a9cb6a259c

Modified Files
--------------
doc/src/sgml/monitoring.sgml | 14 +++++------
src/backend/access/transam/clog.c | 2 +-
src/backend/access/transam/commit_ts.c | 2 +-
src/backend/access/transam/multixact.c | 4 +--
src/backend/access/transam/subtrans.c | 2 +-
src/backend/commands/async.c | 2 +-
src/backend/storage/lmgr/predicate.c | 2 +-
src/include/utils/pgstat_internal.h | 14 +++++------
src/test/isolation/expected/stats.out | 44 ++++++++++++++++-----------------
src/test/isolation/expected/stats_1.out | 44 ++++++++++++++++-----------------
src/test/isolation/specs/stats.spec | 4 +--
src/test/regress/expected/stats.out | 14 +++++------
src/test/regress/sql/stats.sql | 14 +++++------
13 files changed, 81 insertions(+), 81 deletions(-)