containerd: Add error handling in getImageConfig for GetImageHash. #1807

Job	Run time
packages (arm64-secure, arm64)	6m 51s
packages (ubuntu-20.04, amd64)	7m 3s
packages (ubuntu-latest, riscv64)	3m 55s
manifest	4m 4s
eve (arm64, kvm)	11m 32s
eve (arm64, xen)	9m 56s
eve (amd64, kvm)	8m 52s
eve (amd64, xen)	8m 51s
eve (riscv64, mini)	4m 44s
	1h 5m 48s

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