pgsql: Enhance pg_stat_reset_single_table_counters function.

Enhance pg_stat_reset_single_table_counters function.

This commit allows pg_stat_reset_single_table_counters() to reset statistics
for a single relation shared across all databases in the cluster to zero.

Bump catalog version.

Author: B Sadhu Prasad Patro
Reviewed-by: Mahendra Singh Thalor, Himanshu Upadhyaya, Dilip Kumar, Fujii Masao
Discussion: https://postgr.es/m/CAFF0-CGy7EHeF=AqqkGMF85cySPQBgDcvNk73G2O0vL94O5U5A@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/e04267844a9bbf97c2e85c919b84dfe498ab0302

Modified Files
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doc/src/sgml/monitoring.sgml     | 2 +-
src/backend/postmaster/pgstat.c  | 9 +++++++--
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_proc.dat  | 2 +-
4 files changed, 10 insertions(+), 5 deletions(-)