Use image hosted on ghcr.io #276

Job	Run time
Upgrade Test	17m 48s
Integration tests with MySQL (8.0.28) / dbtest	6m 26s
Integration tests with MySQL (8.0.31) / dbtest	6m 17s
Integration tests with MySQL (8.0.32) / dbtest	6m 38s
Supported Kubernetes versions End-to-End Tests (8.0.32, 1.25.9) / e2e	27m 9s
Supported Kubernetes versions End-to-End Tests (8.0.32, 1.26.4) / e2e	33m 3s
Supported Kubernetes versions End-to-End Tests (8.0.32, 1.27.1) / e2e	26m 19s
Supported MySQL versions End-to-End Tests (8.0.28, 1.27.1) / e2e	25m 12s
Supported MySQL versions End-to-End Tests (8.0.31, 1.27.1) / e2e	26m 53s
Supported MySQL versions End-to-End Tests (8.0.32, 1.27.1) / e2e	29m 20s
	3h 25m 5s

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