pgsql: pg_resetwal: Fix incorrect error message related to pg_wal/summa

pg_resetwal: Fix incorrect error message related to pg_wal/summaries/

A failure while closing pg_wal/summaries/ incorrectly generated a report
about pg_wal/archive_status/.

While at it, this commit adds #undefs for the macros used in
KillExistingWALSummaries() and KillExistingArchiveStatus() to prevent
those values from being misused in an incorrect function context.

Oversight in dc212340058b.

Author: Tianchen Zhang <zhang_tian_chen(at)163(dot)com>
Reviewed-by: Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>
Reviewed-by: Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>
Discussion: https://postgr.es/m/SE2P216MB2390C84C23F428A7864EE07FA19BA@SE2P216MB2390.KORP216.PROD.OUTLOOK.COM
Backpatch-through: 17

Branch
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REL_18_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/2ca4464b6992508a6be201ff8f10847e64e2291d

Modified Files
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src/bin/pg_resetwal/pg_resetwal.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)