ref(ACI): Cleanup the code from rolling out the new activity handler #268957

Job	Run time
detect what files changed	8s
api docs test	6m 8s
monolith-dbs test	7m 5s
backend migration tests	10m 11s
select tests	36s
cli test	2m 35s
check migration	1m 30s
backend typing	2m 12s
requirements check	-1s
api url typescript generation	-1s
calculate test shards	5s
backend test (3)	13m 37s
backend test (4)	13m 21s
backend test (0)	14m 21s
backend test (11)	12m 47s
backend test (6)	12m 34s
backend test (2)	13m 46s
backend test (9)	13m 41s
backend test (7)	14m 32s
backend test (10)	13m 22s
backend test (1)	13m 53s
backend test (8)	14m 22s
backend test (13)	14m 2s
backend test (5)	13m 50s
backend test (15)	13m 19s
backend test (16)	10m 59s
backend test (21)	13m 57s
backend test (19)	13m 22s
backend test (20)	15m 24s
backend test (18)	13m 14s
backend test (12)	15m 26s
backend test (14)	12m 49s
backend test (17)	14m 6s
Backend	3s
	5h 31m 15s

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