Remove const generic from arrays #2109

Job	Run time
Lint and Test	23s
build-benchmarks	2m 27s
check-features-with-external-dependencies (-F gdal -F gdal/bindgen)	1m 50s
check-features	33s
check-features-with-external-dependencies (-F geos)	44s
check-features (-F csv)	36s
check-features-with-external-dependencies (-F proj)	47s
check-features (-F flatgeobuf)	14s
check-features (-F flatgeobuf_async)	32s
check-features (-F ipc_compression)	37s
check-features (-F parquet)	31s
check-features (-F parquet_async)	32s
check-features (-F parquet_compression)	50s
check-features (-F polylabel)	31s
check-features (-F postgis)	54s
check-features (-F rayon)	28s
	12m 29s

Provide feedback