Merge pull request #746 from cybozu-go/issue-745 #1041

Job	Run time
Integration tests with MySQL (8.0.28)	6m 6s
Integration tests with MySQL (8.0.36)	6m 7s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.29.4)	1h 17m 48s
Supported MySQL versions End-to-End Tests (8.0.28, 1.31.0)	1h 16m 0s
Integration tests with MySQL (8.0.37)	6m 8s
Upgrade Test	17m 32s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.30.4)	1h 16m 6s
Supported MySQL versions End-to-End Tests (8.0.36, 1.31.0)	1h 18m 15s
Integration tests with MySQL (8.0.39)	6m 11s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.31.0)	1h 15m 33s
Supported MySQL versions End-to-End Tests (8.0.37, 1.31.0)	1h 17m 12s
Integration tests with MySQL (8.4.2)	6m 12s
Supported MySQL versions End-to-End Tests (8.0.39, 1.31.0)	1h 18m 30s
Supported MySQL versions End-to-End Tests (8.4.2, 1.31.0)	1h 15m 23s
Confirm finishing all tests	1s
	11h 3m 4s

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