pgsql: Report progress of ANALYZE commands

Report progress of ANALYZE commands

This uses the progress reporting infrastructure added by c16dc1aca5e0,
adding support for ANALYZE.

Co-authored-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Co-authored-by: Tatsuro Yamada <tatsuro.yamada.tf@nttcom.co.jp>
Reviewed-by: Julien Rouhaud, Robert Haas, Anthony Nowocien, Kyotaro Horiguchi,
        Vignesh C, Amit Langote

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/a166d408eb0b35023c169e765f4664c3b114b52e

Modified Files
--------------
doc/src/sgml/monitoring.sgml            | 188 +++++++++++++++++++++++++++++++-
src/backend/catalog/system_views.sql    |  21 ++++
src/backend/commands/analyze.c          |  33 +++++-
src/backend/statistics/extended_stats.c |  23 ++++
src/backend/utils/adt/pgstatfuncs.c     |   2 +
src/backend/utils/misc/sampling.c       |   6 +-
src/include/catalog/catversion.h        |   2 +-
src/include/commands/progress.h         |  17 +++
src/include/pgstat.h                    |   1 +
src/include/utils/sampling.h            |   4 +-
src/test/regress/expected/rules.out     |  22 ++++
11 files changed, 311 insertions(+), 8 deletions(-)