Remove const generic from arrays #2107

Job	Run time
build-benchmarks	45s
check-features-with-external-dependencies (-F gdal -F gdal/bindgen)	1m 10s
check-features	11s
check-features-with-external-dependencies (-F geos)	46s
check-features (-F csv)	13s
Lint and Test	29s
check-features-with-external-dependencies (-F proj)	59s
check-features (-F flatgeobuf)	16s
check-features (-F flatgeobuf_async)	42s
check-features (-F ipc_compression)	55s
check-features (-F parquet)	32s
check-features (-F parquet_async)	37s
check-features (-F parquet_compression)	43s
check-features (-F polylabel)	27s
check-features (-F postgis)	1m 1s
check-features (-F rayon)	29s
	10m 15s

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