Fewer uses of custom GeometryType concept in MixedArrayBuilder (#870) #2117

Job	Run time
build-benchmarks	2m 29s
Lint and Test	7m 41s
check-features-with-external-dependencies (-F gdal -F gdal/bindgen)	54s
check-features	18s
check-features-with-external-dependencies (-F geos)	27s
check-features (-F csv)	25s
check-features-with-external-dependencies (-F proj)	52s
check-features (-F flatgeobuf)	21s
check-features (-F flatgeobuf_async)	34s
check-features (-F ipc_compression)	23s
check-features (-F parquet)	28s
check-features (-F parquet_async)	29s
check-features (-F parquet_compression)	21s
check-features (-F polylabel)	11s
check-features (-F postgis)	30s
check-features (-F rayon)	28s
	16m 51s

Provide feedback