[PostGIS] #6074: Geography centroid tests fail on 32bit

[PostGIS]

#6074: Geography centroid tests fail on 32bit
---------------------+---------------------------
 Reporter:  strk     |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 3.7.0
Component:  postgis  |    Version:  master
 Keywords:  32bit    |
---------------------+---------------------------
 See https://www.ict.inaf.it/gitlab/postgis/postgis/-/jobs/149342#L5590
 {{{
  regress/core/geography_centroid .. failed (diff expected obtained:
 /tmp/pgis_reg/test_26_diff)
 -----------------------------------------------------------------------------
 --- ./regress/core/geography_centroid_expected  2025-10-01
 20:40:22.037797174 +0000
 +++ /tmp/pgis_reg/test_26_out   2026-04-17 09:10:28.783845075 +0000
 @@ -1,5 +1,5 @@
 -geog_centroid_mpt_pole_north|POINT(0 90)
 -geog_centroid_mpt_pole_south|POINT(0 -90)
 +geog_centroid_mpt_pole_north|POINT(180 90)
 +geog_centroid_mpt_pole_south|POINT(180 -90)
  geog_centroid_mpt_idl_1|180.000000|0.000000
  geog_centroid_mpt_idl_2|179.500000|0.000000
  geog_centroid_mpt_idl_3|-179.500000|0.000000
 -----------------------------------------------------------------------------
 }}}

 With #6073 these are the only failing tests as of
 [26012786958aedb55589c0696086f7c48fc9fc46/git]
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6074>
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