pgsql: Revert structural changes to not-null constraints

Revert structural changes to not-null constraints

There are some problems with the new way to handle these constraints
that were detected at the last minute, and require fixes that appear too
invasive to be doing this late in the cycle. Revert this (again) for
now, we'll try again with these problems fixed.

The following commits are reverted:

b0e96f311985 Catalog not-null constraints
9b581c534186 Disallow changing NO INHERIT status of a not-null constraint
d0ec2ddbe088 Fix not-null constraint test
ac22a9545ca9 Move privilege check to the right place
b0f7dd915bca Check stack depth in new recursive functions
3af721794272 Update information_schema definition for not-null constraints
c3709100be73 Fix propagating attnotnull in multiple inheritance
d9f686a72ee9 Fix restore of not-null constraints with inheritance
d72d32f52d26 Don't try to assign smart names to constraints
0cd711271d42 Better handle indirect constraint drops
13daa33fa5a6 Disallow NO INHERIT not-null constraints on partitioned tables
d45597f72fe5 Disallow direct change of NO INHERIT of not-null constraints
21ac38f498b3 Fix inconsistencies in error messages

Discussion: https://postgr.es/m/202405110940.joxlqcx4dogd@alvherre.pgsql

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/6f8bb7c1e9610dd7af20cdaf74c4ff6e6d678d44

Modified Files
--------------
contrib/sepgsql/expected/alter.out | 3 +
contrib/sepgsql/expected/ddl.out | 2 -
contrib/test_decoding/expected/ddl.out | 12 -
doc/src/sgml/catalogs.sgml | 13 +-
doc/src/sgml/ddl.sgml | 55 +-
doc/src/sgml/ref/alter_table.sgml | 13 +-
doc/src/sgml/ref/create_table.sgml | 8 +-
src/backend/catalog/heap.c | 386 +----
src/backend/catalog/information_schema.sql | 71 +-
src/backend/catalog/pg_constraint.c | 441 +-----
src/backend/commands/tablecmds.c | 1664 +++++---------------
src/backend/optimizer/util/plancat.c | 2 -
src/backend/parser/gram.y | 19 +-
src/backend/parser/parse_utilcmd.c | 288 +---
src/backend/utils/adt/ruleutils.c | 22 -
src/backend/utils/cache/relcache.c | 42 +-
src/bin/pg_dump/common.c | 19 +-
src/bin/pg_dump/pg_dump.c | 322 +---
src/bin/pg_dump/pg_dump.h | 9 +-
src/bin/pg_dump/t/002_pg_dump.pl | 10 +-
src/bin/psql/describe.c | 44 -
src/include/catalog/catversion.h | 2 +-
src/include/catalog/heap.h | 8 +-
src/include/catalog/pg_constraint.h | 7 -
src/include/nodes/parsenodes.h | 11 +-
.../test_ddl_deparse/expected/alter_table.out | 18 +-
.../test_ddl_deparse/expected/create_table.out | 26 +-
.../modules/test_ddl_deparse/test_ddl_deparse.c | 6 +-
src/test/regress/expected/alter_table.out | 24 +-
src/test/regress/expected/cluster.out | 7 +-
src/test/regress/expected/constraints.out | 518 ------
src/test/regress/expected/create_table.out | 35 +-
src/test/regress/expected/create_table_like.out | 10 -
src/test/regress/expected/event_trigger.out | 2 -
src/test/regress/expected/foreign_data.out | 108 +-
src/test/regress/expected/foreign_key.out | 16 +-
src/test/regress/expected/generated.out | 2 -
src/test/regress/expected/identity.out | 4 -
src/test/regress/expected/indexing.out | 38 +-
src/test/regress/expected/inherit.out | 510 ------
src/test/regress/expected/partition_merge.out | 2 -
src/test/regress/expected/publication.out | 6 -
src/test/regress/expected/replica_identity.out | 24 -
src/test/regress/expected/rowsecurity.out | 2 -
src/test/regress/sql/alter_table.sql | 12 +-
src/test/regress/sql/constraints.sql | 217 ---
src/test/regress/sql/indexing.sql | 5 +-
src/test/regress/sql/inherit.sql | 229 ---
src/test/regress/sql/replica_identity.sql | 15 -
49 files changed, 709 insertions(+), 4600 deletions(-)