[Backport release/3.8] gdal_sieve.py/gdalattachpct.py/gdalcompare.py/gdalmove.py: make sure --version and --help return 0 error code (fixes #8717)#8728

Merged

rouault merged 1 commit intorelease/3.8from backport-8720-to-release/3.8

Nov 17, 2023

+420-29

Commits on Nov 16, 2023

gdal_sieve.py/gdalattachpct.py/gdalcompare.py/gdalmove.py: make sure --version and --help return 0 error code (fixes #8717 )

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