Restore original copyright holder in pax qp_gist_indexes3 tests

When the regress tests were ported to pax (ae52403), a blanket
Greenplum -> Cloudberry rename also rewrote the 2010 copyright
notices to "Cloudberry, Inc", a company that never existed and never
held that copyright. Restore "Greenplum, Inc." so the notices match
the originals in src/test/regress.

Only comment lines inside start_ignore blocks change; test behavior
is unaffected.

(cherry picked from commit c579926)

Author: tuhaihe

contrib/pax_storage/src/test/regress/expected/qp_gist_indexes3.out

@@ -10,7 +10,7 @@ set search_path to qp_gist_indexes3;
 -- ----------------------------------------------------------------------
 ------------------------------------------------------------------------------
 -- start_ignore
--- Portions Copyright (c) 2010, Cloudberry, Inc.  All rights reserved.
+-- Portions Copyright (c) 2010, Greenplum, Inc.  All rights reserved.
 -- Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
 -- PURPOSE:
 --     Test VACUUM on GiST indexes.
@@ -83,7 +83,7 @@ LANGUAGE PLPGSQL
 -- ----------------------------------------------------------------------
 ------------------------------------------------------------------------------
 -- start_ignore
--- COPYRIGHT (c) 2010, Cloudberry, Inc.  All rights reserved.  
+-- COPYRIGHT (c) 2010, Greenplum, Inc.  All rights reserved.  
 -- PURPOSE:
 --     Test VACUUM on GiST indexes.
 --     Also test somewhat larger data sets than most of my other GiST index 

contrib/pax_storage/src/test/regress/expected/qp_gist_indexes3_optimizer.out

@@ -10,7 +10,7 @@ set search_path to qp_gist_indexes3;
 -- ----------------------------------------------------------------------
 ------------------------------------------------------------------------------
 -- start_ignore
--- Portions Copyright (c) 2010, Cloudberry, Inc.  All rights reserved.
+-- Portions Copyright (c) 2010, Greenplum, Inc.  All rights reserved.
 -- Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
 -- PURPOSE:
 --     Test VACUUM on GiST indexes.
@@ -83,7 +83,7 @@ LANGUAGE PLPGSQL
 -- ----------------------------------------------------------------------
 ------------------------------------------------------------------------------
 -- start_ignore
--- COPYRIGHT (c) 2010, Cloudberry, Inc.  All rights reserved.  
+-- COPYRIGHT (c) 2010, Greenplum, Inc.  All rights reserved.  
 -- PURPOSE:
 --     Test VACUUM on GiST indexes.
 --     Also test somewhat larger data sets than most of my other GiST index 

contrib/pax_storage/src/test/regress/sql/qp_gist_indexes3.sql

@@ -14,7 +14,7 @@ set search_path to qp_gist_indexes3;
 
 ------------------------------------------------------------------------------
 -- start_ignore
--- Portions Copyright (c) 2010, Cloudberry, Inc.  All rights reserved.
+-- Portions Copyright (c) 2010, Greenplum, Inc.  All rights reserved.
 -- Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
 -- PURPOSE:
 --     Test VACUUM on GiST indexes.
@@ -91,7 +91,7 @@ LANGUAGE PLPGSQL
 
 ------------------------------------------------------------------------------
 -- start_ignore
--- COPYRIGHT (c) 2010, Cloudberry, Inc.  All rights reserved.  
+-- COPYRIGHT (c) 2010, Greenplum, Inc.  All rights reserved.  
 -- PURPOSE:
 --     Test VACUUM on GiST indexes.
 --     Also test somewhat larger data sets than most of my other GiST index