feat(alerts): Allow arithmetic in alert validation #250778

Job	Run time
detect what files changed	12s
backend migration tests	9m 40s
cli test	1m 57s
monolith-dbs test	6m 59s
api docs test	5m 26s
backend typing	3m 56s
select tests	39s
check migration	1m 9s
requirements check	0s
api url typescript generation	0s
calculate test shards	8s
backend test (0)	7m 33s
backend test (4)	6m 43s
backend test (3)	6m 54s
backend test (1)	7m 6s
backend test (2)	6m 38s
Backend	2s
	1h 5m 2s

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