Add cloud image installer for Gigabyte Ampere server. #2

Job	Run time
download-cidata-job	9s
build-cloud-installer-initramfs-job	8m 5s
build-cloud-installer-job	13m 21s
test-iso-multidisk-qemu-disk2-with-data-job	6h 5m 0s
test-iso-multidisk-qemu-disk5-with-data-job	6h 5m 1s
test-iso-cf-qemu-job	6h 5m 0s
test-iso-multidisk-qemu-empty-disk-job	6h 5m 0s
test-iso-qemu-job	6h 5m 0s
test-iso-cf-container-qemu-job	6h 5m 0s
	1d 12h 51m 36s

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