ref(ui): Remove testableTransition utility #247411

Job	Run time
detect what files changed	12s
monolith-dbs test	-1s
prepare selective tests	-1s
requirements check	-1s
backend typing	-1s
api docs test	-1s
api url typescript generation	-1s
backend migration tests	-1s
calculate test shards	0s
check migration	-1s
cli test	-1s
backend test	0s
Backend	2s
	5s

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