ref(grouping): remove ProjectGroupingConfigsEndpoint #248478

Job	Run time
detect what files changed	12s
backend typing	4m 32s
api docs test	5m 47s
select tests	34s
cli test	1m 50s
api url typescript generation	2m 3s
monolith-dbs test	6m 7s
check migration	1m 15s
backend migration tests	8m 51s
requirements check	0s
calculate test shards	9s
backend test	0s
Backend	2s
	31m 22s

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