pgsql: Use named boolean parameters for pg_get_*_ddl option arguments

Use named boolean parameters for pg_get_*_ddl option arguments

Replace the VARIADIC text[] alternating key/value option interface with
typed named boolean parameters for pg_get_role_ddl(), pg_get_tablespace_ddl(),
and pg_get_database_ddl(), as added by commit 4881981f920 and friends.
The new signatures are:

pg_get_role_ddl(role regrole,
pretty boolean DEFAULT false,
memberships boolean DEFAULT true)

pg_get_tablespace_ddl(tablespace oid/name,
pretty boolean DEFAULT false,
owner boolean DEFAULT true)

pg_get_database_ddl(db regdatabase,
pretty boolean DEFAULT false,
owner boolean DEFAULT true,
tablespace boolean DEFAULT true)

This provides type safety at the SQL level, allows named-argument calling
syntax (pretty => true), removes the runtime string-parsing machinery
(DdlOption, parse_ddl_options) in favour of direct PG_GETARG_BOOL() calls,
and allows the functions to be marked STRICT.

While we're here, I added an extra TAP test for pg_get_database(owner =>
false, ...)

Catalog version bumped.

Author: Jelte Fennema-Nio <postgres(at)jeltef(dot)nl>
Discussion: https://postgr.es/m/DHM6C7SLS4BN.1WW9Z4PRPN0VJ@jeltef.nl
(and on Discord)

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/d6ed87d19890b1cfa93d1f6e8957fa525834c0e2

Modified Files
--------------
doc/src/sgml/func/func-info.sgml | 54 +++---
src/backend/utils/adt/ddlutils.c | 260 +++------------------------
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_proc.dat | 41 +++--
src/test/modules/test_misc/t/012_ddlutils.pl | 28 +--
5 files changed, 95 insertions(+), 290 deletions(-)