pgsql: Add backup_type column to pg_stat_progress_basebackup.

Add backup_type column to pg_stat_progress_basebackup.

This commit introduces a new column backup_type that indicates the
type of backup being performed: either 'full' or 'incremental'.

Bump catalog version.

Author: Shinya Kato <shinya11(dot)kato(at)gmail(dot)com>
Reviewed-by: Yugo Nagata <nagata(at)sraoss(dot)co(dot)jp>
Discussion: https://postgr.es/m/CAOzEurQuzbHwTj1ehk1a+eeQDidJPyrE5s6mYumkjwjZnurhkQ@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/deb674454c5cb7ecabecee2e04ca929eee570df4

Modified Files
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doc/src/sgml/monitoring.sgml | 10 ++++++++++
src/backend/backup/basebackup.c | 2 +-
src/backend/backup/basebackup_progress.c | 9 +++++++--
src/backend/catalog/system_views.sql | 5 ++++-
src/include/backup/basebackup_sink.h | 3 ++-
src/include/catalog/catversion.h | 2 +-
src/include/commands/progress.h | 5 +++++
src/test/regress/expected/rules.out | 7 ++++++-
8 files changed, 36 insertions(+), 7 deletions(-)