adding definition files to build custom HPC image based on Ubuntu #356

Job	Run time
set_image_list	1m 38s
set_image_list	1m 38s
build_image (azhop-compute-centos-7_9)	33s
build_image (azhop-compute-centos-7_9)	33s
build_image (azhop-desktop-centos-7_9)	32s
build_image (azhop-desktop-centos-7_9)	32s
build_image (azhop-desktop-centos-7_9-gen1)	28s
build_image (azhop-desktop-centos-7_9-gen1)	28s
build_image (azhop-desktop-almalinux-8_7)	29s
build_image (azhop-desktop-almalinux-8_7)	29s
build_image (azhop-compute-almalinux-8_7)	33s
build_image (azhop-compute-almalinux-8_7)	33s
build_image (azhop-compute-ubuntu-20_04)	5m 22s
build_image (azhop-compute-ubuntu-20_04)	27m 48s
build_image (azhop-desktop-ubuntu-20_04)	28m 53s
build_image (azhop-desktop-ubuntu-20_04)	28m 53s
copy_disk	0s
copy_disk	0s
put_offer	0s
put_offer	0s
	1h 39m 22s

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