pgsql: Add delay time to VACUUM/ANALYZE (VERBOSE) and autovacuum logs.

Add delay time to VACUUM/ANALYZE (VERBOSE) and autovacuum logs.

Commit bb8dff9995 added this information to the
pg_stat_progress_vacuum and pg_stat_progress_analyze system views.
This commit adds the same information to the output of VACUUM and
ANALYZE with the VERBOSE option and to the autovacuum logs.

Suggested-by: Masahiro Ikeda <ikedamsh(at)oss(dot)nttdata(dot)com>
Author: Bertrand Drouvot <bertranddrouvot(dot)pg(at)gmail(dot)com>
Discussion: https://postgr.es/m/ZmaXmWDL829fzAVX%40ip-10-97-1-34.eu-west-3.compute.internal

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7720082ae53280857f1eacb86134a9a759290f40

Modified Files
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doc/src/sgml/config.sgml | 9 ++++++---
src/backend/access/heap/vacuumlazy.c | 11 +++++++++++
src/backend/commands/analyze.c | 9 +++++++++
3 files changed, 26 insertions(+), 3 deletions(-)