ref(grouping): remove unused EventGroupingConfig type #248509

Job	Run time
detect what files changed	14s
api docs test	0s
monolith-dbs test	0s
cli test	0s
backend typing	0s
backend migration tests	0s
check migration	0s
select tests	0s
api url typescript generation	0s
requirements check	0s
calculate test shards	-1s
Backend	2s
backend test	0s
	15s

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