Merge branch 'fix/richards-ug-tests' into 'master'

Timo Kochrequested to merge
cherry-pick-f70d30c3 into releases/3.2

[tests][richards] Replace HAVE_UG in CMakeLists

See merge request !2109 (merged)

(cherry picked from commit f70d30c3)

bfd873af [tests][richards] Replace HAVE_UG in CMakeLists

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