Update ORCA expected file for altering indexed column

Commit 28dd0152 relaxed the restriction on
altering indexed columns, but missed to update the expected test
output for ORCA. This applies the diff from qp_misc_jiras.out to the
_optimizer.out file as well.

src/test/regress/expected/qp_misc_jiras_optimizer.out

@@ -21,20 +21,16 @@ NOTICE:  Table doesn't have 'DISTRIBUTED BY' clause -- Using column named 'dummy
 HINT:  The 'DISTRIBUTED BY' clause determines the distribution of data. Make sure column(s) chosen are the optimal data distribution key to minimize skew.
 create index tbl1318_daa on qp_misc_jiras.tbl1318(dummy,aa);
 alter table qp_misc_jiras.tbl1318 alter column aa type integer using  bit_length(aa);
-ERROR:  cannot alter indexed column
-HINT:  DROP the index first, and recreate it after the ALTER
 drop index qp_misc_jiras.tbl1318_daa;
-alter table qp_misc_jiras.tbl1318 alter column aa type integer using  bit_length(aa);
+alter table qp_misc_jiras.tbl1318 alter column aa type integer using  bit_length(aa::text);
 drop table qp_misc_jiras.tbl1318;
 create table qp_misc_jiras.tbl1318(dummy integer, aa text not null);
 NOTICE:  Table doesn't have 'DISTRIBUTED BY' clause -- Using column named 'dummy' as the Greenplum Database data distribution key for this table.
 HINT:  The 'DISTRIBUTED BY' clause determines the distribution of data. Make sure column(s) chosen are the optimal data distribution key to minimize skew.
 create index tbl1318_daa on qp_misc_jiras.tbl1318 using bitmap(dummy,aa);
 alter table qp_misc_jiras.tbl1318 alter column aa type integer using  bit_length(aa);
-ERROR:  cannot alter indexed column
-HINT:  DROP the index first, and recreate it after the ALTER
 drop index qp_misc_jiras.tbl1318_daa;
-alter table qp_misc_jiras.tbl1318 alter column aa type integer using  bit_length(aa);
+alter table qp_misc_jiras.tbl1318 alter column aa type integer using  bit_length(aa::text);
 drop table qp_misc_jiras.tbl1318;
 -- Test for the upstream bug with combocids:
 -- https://www.postgresql.org/message-id/48B87164.4050802%40soe.ucsc.edu