Set procost to 10 for each of the pg_foo_is_visible() functions.

The idea here is to make sure the planner will evaluate these functions
last not first among the filter conditions in psql pattern search and
tab-completion queries.  We've discussed this several times, and there
was consensus to do it back in August, but we didn't want to do it just
before a release.  Now seems like a safer time.

No catversion bump, since this catalog change doesn't create a backend
incompatibility nor any regression test result changes.

src/include/catalog/pg_proc.h

@@ -2908,29 +2908,29 @@ DESCR("view two-phase transactions");
 DATA(insert OID = 3537 (  pg_describe_object		PGNSP PGUID 12 1 0 0 0 f f f f t f s 3 0 25 "26 26 23" _null_ _null_ _null_ _null_ pg_describe_object _null_ _null_ _null_ ));
 DESCR("get identification of SQL object");
 
-DATA(insert OID = 2079 (  pg_table_is_visible		PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_table_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 2079 (  pg_table_is_visible		PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_table_is_visible _null_ _null_ _null_ ));
 DESCR("is table visible in search path?");
-DATA(insert OID = 2080 (  pg_type_is_visible		PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_type_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 2080 (  pg_type_is_visible		PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_type_is_visible _null_ _null_ _null_ ));
 DESCR("is type visible in search path?");
-DATA(insert OID = 2081 (  pg_function_is_visible	PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_function_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 2081 (  pg_function_is_visible	PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_function_is_visible _null_ _null_ _null_ ));
 DESCR("is function visible in search path?");
-DATA(insert OID = 2082 (  pg_operator_is_visible	PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_operator_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 2082 (  pg_operator_is_visible	PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_operator_is_visible _null_ _null_ _null_ ));
 DESCR("is operator visible in search path?");
-DATA(insert OID = 2083 (  pg_opclass_is_visible		PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_opclass_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 2083 (  pg_opclass_is_visible		PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_opclass_is_visible _null_ _null_ _null_ ));
 DESCR("is opclass visible in search path?");
-DATA(insert OID = 3829 (  pg_opfamily_is_visible	PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_opfamily_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 3829 (  pg_opfamily_is_visible	PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_opfamily_is_visible _null_ _null_ _null_ ));
 DESCR("is opfamily visible in search path?");
-DATA(insert OID = 2093 (  pg_conversion_is_visible	PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_conversion_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 2093 (  pg_conversion_is_visible	PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_conversion_is_visible _null_ _null_ _null_ ));
 DESCR("is conversion visible in search path?");
-DATA(insert OID = 3756 (  pg_ts_parser_is_visible	PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_parser_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 3756 (  pg_ts_parser_is_visible	PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_parser_is_visible _null_ _null_ _null_ ));
 DESCR("is text search parser visible in search path?");
-DATA(insert OID = 3757 (  pg_ts_dict_is_visible		PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_dict_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 3757 (  pg_ts_dict_is_visible		PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_dict_is_visible _null_ _null_ _null_ ));
 DESCR("is text search dictionary visible in search path?");
-DATA(insert OID = 3768 (  pg_ts_template_is_visible PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_template_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 3768 (  pg_ts_template_is_visible PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_template_is_visible _null_ _null_ _null_ ));
 DESCR("is text search template visible in search path?");
-DATA(insert OID = 3758 (  pg_ts_config_is_visible	PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_config_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 3758 (  pg_ts_config_is_visible	PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_ts_config_is_visible _null_ _null_ _null_ ));
 DESCR("is text search configuration visible in search path?");
-DATA(insert OID = 3815 (  pg_collation_is_visible	PGNSP PGUID 12 1 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_collation_is_visible _null_ _null_ _null_ ));
+DATA(insert OID = 3815 (  pg_collation_is_visible	PGNSP PGUID 12 10 0 0 0 f f f f t f s 1 0 16 "26" _null_ _null_ _null_ _null_ pg_collation_is_visible _null_ _null_ _null_ ));
 DESCR("is collation visible in search path?");
 
 DATA(insert OID = 2854 (  pg_my_temp_schema			PGNSP PGUID 12 1 0 0 0 f f f f t f s 0 0 26 "" _null_ _null_ _null_ _null_ pg_my_temp_schema _null_ _null_ _null_ ));