Sorting functions for common use #871

Job	Run time
build (3Mi, full-backup)	27m 11s
build (3Mi, change-to-primary)	29m 4s
build (3Mi, !//)	23m 34s
build (3Mi, change-to-secondary)	25m 39s
build (3Mi, incr-backup)	31m 18s
build (10Mi, various-transfer-part-size)	20m 25s
build (3Mi, backup-failure)	30m 25s
build (200Gi, various-transfer-part-size)	22m 28s
build (3Mi, change-to-standalone)	20m 41s
	3h 50m 45s

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