[PostGIS] #6051: GHA msys2 showing lots of warnings and one error

[PostGIS]

#6051: GHA msys2 showing lots of warnings and one error
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 Reporter:  robe     |      Owner:  robe
     Type:  defect   |     Status:  assigned
 Priority:  medium   |  Milestone:  PostGIS 3.7.0
Component:  build    |    Version:  3.5.x
 Keywords:  windows  |
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 I turned msys2 back on in master, and it's failing.
 I can't remember the last time where it wwas erroring what it was erroring
 on that we decided to turn it off..
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6051>
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