Remove const generic from arrays #2111

Job	Run time
build-benchmarks	2m 37s
check-features	17s
check-features (-F csv)	22s
check-features (-F flatgeobuf)	16s
check-features-with-external-dependencies (-F gdal -F gdal/bindgen)	54s
check-features (-F flatgeobuf_async)	41s
check-features-with-external-dependencies (-F geos)	49s
check-features (-F ipc_compression)	17s
check-features-with-external-dependencies (-F proj)	1m 9s
check-features (-F parquet)	28s
check-features (-F parquet_async)	41s
Lint and Test	7m 21s
check-features (-F parquet_compression)	44s
check-features (-F polylabel)	26s
check-features (-F postgis)	43s
check-features (-F rayon)	22s
	18m 7s

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