feat(integrations): Add API driven pipeline for Slack #247866

Job	Run time
detect what files changed	12s
cli test	2m 1s
api docs test	5m 38s
backend migration tests	7m 54s
select tests	33s
check migration	1m 17s
monolith-dbs test	7m 18s
backend typing	4m 5s
requirements check	0s
api url typescript generation	0s
calculate test shards	7s
backend test (1)	5m 34s
backend test (0)	5m 15s
Backend	2s
	39m 56s

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