Merge pull request #751 from cybozu-go/issue-747 #1101

Job	Run time
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.29.4)	1h 30m 27s
Integration tests with MySQL (8.0.28)	6m 46s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.30.4)	1h 29m 28s
Integration tests with MySQL (8.0.36)	6m 41s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.31.0)	1h 29m 48s
Integration tests with MySQL (8.0.37)	6m 41s
Supported MySQL versions End-to-End Tests (8.0.28, 1.31.0)	1h 29m 29s
Integration tests with MySQL (8.0.39)	6m 34s
Supported MySQL versions End-to-End Tests (8.0.36, 1.31.0)	1h 31m 34s
Integration tests with MySQL (8.4.2)	6m 40s
Upgrade Test	17m 20s
Supported MySQL versions End-to-End Tests (8.0.37, 1.31.0)	1h 30m 40s
Supported MySQL versions End-to-End Tests (8.0.39, 1.31.0)	1h 31m 37s
Supported MySQL versions End-to-End Tests (8.4.2, 1.31.0)	1h 29m 58s
Confirm finishing all tests	1s
	12h 53m 44s

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