ci: bring the dependencies check back #1483

Job	Run time
filter	1m 1s
downstream-compatibility (spring-cloud-gcp)	11m 59s
downstream-compatibility (java-firestore)	4m 23s
downstream-compatibility (java-pubsub)	3m 31s
downstream-compatibility (java-pubsublite)	4m 2s
downstream-compatibility (java-bigtable)	8m 26s
conditional-required-check	3s
	33m 25s

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