Merge pull request #758 from cybozu-go/bump-chart-v0.15.0 #1110

Job	Run time
Integration tests with MySQL (8.0.28)	6m 28s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.29.4)	1h 28m 39s
Integration tests with MySQL (8.0.36)	6m 30s
Supported MySQL versions End-to-End Tests (8.0.28, 1.31.0)	1h 31m 16s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.30.4)	1h 29m 16s
Supported MySQL versions End-to-End Tests (8.0.36, 1.31.0)	1h 31m 8s
Supported Kubernetes versions End-to-End Tests (8.4.2, 1.31.0)	1h 29m 18s
Integration tests with MySQL (8.0.37)	6m 39s
Supported MySQL versions End-to-End Tests (8.0.37, 1.31.0)	1h 31m 13s
Integration tests with MySQL (8.0.39)	6m 45s
Supported MySQL versions End-to-End Tests (8.0.39, 1.31.0)	1h 31m 9s
Integration tests with MySQL (8.4.2)	6m 38s
Upgrade Test	17m 35s
Supported MySQL versions End-to-End Tests (8.4.2, 1.31.0)	1h 29m 37s
Confirm finishing all tests	1s
	12h 52m 12s

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