Sorting functions for common use #874

Job	Run time
build (3Mi, backup-failure)	28m 39s
build (3Mi, incr-backup)	30m 6s
build (3Mi, change-to-standalone)	22m 45s
build (3Mi, change-to-secondary)	25m 45s
build (3Mi, !//)	36m 38s
build (200Gi, various-transfer-part-size)	21m 55s
build (10Mi, various-transfer-part-size)	21m 50s
build (3Mi, change-to-primary)	27m 28s
build (3Mi, full-backup)	27m 35s
	4h 2m 41s

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