CICD: Pull image before running the test #660

Job	Run time
Build (8)	57s
Full verify (8)	1m 38s
Setup ITs	6s
Unit tests (8)	2m 0s
Cassandra ITs (RELEASE-3.X, 8)	18m 50s
Scylla ITs (ENTERPRISE-RELEASE, 8)	24m 7s
Cassandra ITs (RELEASE-4.X, 8)	23s
Scylla ITs (ENTERPRISE-PRIOR-RELEASE, 8)	27m 54s
Scylla ITs (OSS-RELEASE, 8)	29s
Scylla ITs (OSS-PRIOR-RELEASE, 8)	9m 57s
Scylla ITs (ENTERPRISE-RC, 8)	9m 57s
Scylla ITs (OSS-RC, 8)	31s
	1h 36m 49s

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