gdal raster contour/footprint/polygon: fix issue with temporary gpkg file on MacOS #26126

Job	Run time
code_quality_checks	1m 23s
binary_files	26s
other_checks	30s
cppcheck_master	14m 46s
cppcheck_2004	7m 53s
cppcheck_2404	29m 56s
check-driver-connection-prefix	15s
validate_xml	29s
check-config-options	14s
linting	1m 36s
cmake-lint	0s
	57m 28s

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