Split PREPARE_GENOME into REFERENCES + INDICES subworkflows #1186

Job	Run time
nf-test-changes-arm	21s
docker-arm64 \| 25.04.3 \| 2/14	9m 53s
docker-arm64 \| 25.04.3 \| 6/14	16m 55s
docker-arm64 \| 25.04.3 \| 3/14	8m 59s
docker-arm64 \| 25.04.3 \| 1/14	20m 33s
docker-arm64 \| latest-everything \| 6/14	16m 26s
docker-arm64 \| latest-everything \| 3/14	8m 34s
docker-arm64 \| 25.04.3 \| 4/14	10m 28s
docker-arm64 \| 25.04.3 \| 7/14	9m 34s
docker-arm64 \| latest-everything \| 7/14	9m 26s
docker-arm64 \| latest-everything \| 8/14	17m 9s
docker-arm64 \| latest-everything \| 4/14	10m 7s
docker-arm64 \| latest-everything \| 2/14	9m 37s
docker-arm64 \| 25.04.3 \| 11/14	19m 25s
docker-arm64 \| latest-everything \| 11/14	19m 0s
docker-arm64 \| latest-everything \| 9/14	23m 43s
docker-arm64 \| 25.04.3 \| 8/14	17m 45s
docker-arm64 \| 25.04.3 \| 9/14	24m 14s
docker-arm64 \| 25.04.3 \| 10/14	25m 9s
docker-arm64 \| latest-everything \| 5/14	12m 53s
docker-arm64 \| 25.04.3 \| 5/14	13m 19s
docker-arm64 \| latest-everything \| 14/14	15m 1s
docker-arm64 \| latest-everything \| 10/14	24m 51s
docker-arm64 \| 25.04.3 \| 13/14	17m 54s
docker-arm64 \| 25.04.3 \| 12/14	19m 26s
docker-arm64 \| 25.04.3 \| 14/14	15m 9s
docker-arm64 \| latest-everything \| 12/14	19m 28s
docker-arm64 \| latest-everything \| 13/14	16m 55s
docker-arm64 \| latest-everything \| 1/14	19m 55s
confirm-pass-arm	6s
	7h 32m 15s

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