Update comments to match location of definition

Commit cc50080a82 rearranged testsuites to reduce dependencies, but
missed to update a comment when moving an operator class definition.
Also fix a typo in that same comment while here.

Author: Suraj Kharage <suraj.kharage@enterprisedb.com>
Discussion: https://postgr.es/m/CAF1DzPWXd2yq9_=P905cEypMVKw3ho+Fpj4HwJ4ta8T-eh+Yig@mail.gmail.com

src/test/regress/expected/alter_table.out

@@ -4209,7 +4209,7 @@ CREATE TABLE quuux2 PARTITION OF quuux FOR VALUES IN (2);
 DROP TABLE quuux;
 -- check validation when attaching hash partitions
 -- Use hand-rolled hash functions and operator class to get predictable result
--- on different machines. part_test_int4_ops is defined in insert.sql.
+-- on different machines. part_test_int4_ops is defined in test_setup.sql.
 -- check that the new partition won't overlap with an existing partition
 CREATE TABLE hash_parted (
 	a int,

src/test/regress/expected/hash_part.out

@@ -3,7 +3,7 @@
 --
 -- Use hand-rolled hash functions and operator classes to get predictable
 -- result on different machines.  See the definitions of
--- part_part_test_int4_ops and part_test_text_ops in insert.sql.
+-- part_test_int4_ops and part_test_text_ops in test_setup.sql.
 CREATE TABLE mchash (a int, b text, c jsonb)
   PARTITION BY HASH (a part_test_int4_ops, b part_test_text_ops);
 CREATE TABLE mchash1

src/test/regress/expected/partition_prune.out

@@ -1741,7 +1741,7 @@ drop table lp, coll_pruning, rlp, mc3p, mc2p, boolpart, iboolpart, boolrangep, r
 --
 -- Use hand-rolled hash functions and operator classes to get predictable
 -- result on different machines.  See the definitions of
--- part_part_test_int4_ops and part_test_text_ops in insert.sql.
+-- part_test_int4_ops and part_test_text_ops in test_setup.sql.
 --
 create table hp (a int, b text, c int)
   partition by hash (a part_test_int4_ops, b part_test_text_ops);

src/test/regress/sql/alter_table.sql

@@ -2676,7 +2676,7 @@ DROP TABLE quuux;
 -- check validation when attaching hash partitions
 
 -- Use hand-rolled hash functions and operator class to get predictable result
--- on different machines. part_test_int4_ops is defined in insert.sql.
+-- on different machines. part_test_int4_ops is defined in test_setup.sql.
 
 -- check that the new partition won't overlap with an existing partition
 CREATE TABLE hash_parted (

src/test/regress/sql/hash_part.sql

@@ -4,7 +4,7 @@
 
 -- Use hand-rolled hash functions and operator classes to get predictable
 -- result on different machines.  See the definitions of
--- part_part_test_int4_ops and part_test_text_ops in insert.sql.
+-- part_test_int4_ops and part_test_text_ops in test_setup.sql.
 
 CREATE TABLE mchash (a int, b text, c jsonb)
   PARTITION BY HASH (a part_test_int4_ops, b part_test_text_ops);

src/test/regress/sql/partition_prune.sql

@@ -337,7 +337,7 @@ drop table lp, coll_pruning, rlp, mc3p, mc2p, boolpart, iboolpart, boolrangep, r
 --
 -- Use hand-rolled hash functions and operator classes to get predictable
 -- result on different machines.  See the definitions of
--- part_part_test_int4_ops and part_test_text_ops in insert.sql.
+-- part_test_int4_ops and part_test_text_ops in test_setup.sql.
 --
 
 create table hp (a int, b text, c int)