Fix: Convert bcf_annotations.tbi from empty() to value channel to prevent stalling #6529

Job	Run time
Test workflow \| docker \| 24.04.2 \| 1/5	2m 47s
Test workflow \| docker \| 24.04.2 \| 2/5	4m 39s
Test workflow \| docker \| 24.04.2 \| 3/5	2m 48s
Test workflow \| docker \| 24.04.2 \| 4/5	2m 38s
Test workflow \| docker \| 24.04.2 \| 5/5	2m 36s
Test function \| docker \| 24.04.2 \| 1/5	4m 24s
Test function \| docker \| 24.04.2 \| 2/5	3m 7s
Test function \| docker \| 24.04.2 \| 3/5	3m 50s
Test function \| docker \| 24.04.2 \| 4/5	4m 40s
Test function \| docker \| 24.04.2 \| 5/5	2m 46s
Test pipeline \| docker \| 24.04.2 \| 1/5	16m 26s
Test pipeline \| docker \| 24.04.2 \| 2/5	18m 4s
Test pipeline \| docker \| 24.04.2 \| 3/5	16m 19s
Test pipeline \| docker \| 24.04.2 \| 4/5	15m 9s
Test pipeline \| docker \| 24.04.2 \| 5/5	15m 7s
Test workflow \| docker \| latest-everything \| 1/5	3m 30s
Test workflow \| docker \| latest-everything \| 2/5	3m 59s
Test workflow \| docker \| latest-everything \| 3/5	4m 1s
Test workflow \| docker \| latest-everything \| 4/5	2m 54s
Test workflow \| docker \| latest-everything \| 5/5	4m 20s
Test function \| docker \| latest-everything \| 1/5	3m 42s
Test function \| docker \| latest-everything \| 2/5	2m 52s
Test function \| docker \| latest-everything \| 3/5	2m 25s
Test function \| docker \| latest-everything \| 4/5	2m 50s
Test function \| docker \| latest-everything \| 5/5	3m 25s
Test pipeline \| docker \| latest-everything \| 1/5	15m 3s
Test pipeline \| docker \| latest-everything \| 2/5	16m 4s
Test pipeline \| docker \| latest-everything \| 3/5	18m 22s
Test pipeline \| docker \| latest-everything \| 4/5	13m 45s
Test pipeline \| docker \| latest-everything \| 5/5	15m 14s
	3h 47m 46s

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