RFC: add encrypted scratch space for sandbox #3245

Job	Run time
authorize	1s
e2e / libvirt_e2e_arch_prep	4s
e2e / prep_install	7s
e2e / caa_image_s390x / build and push (dev, linux/s390x)	6m 22s
e2e / caa_image_amd64 / build and push (dev, linux/amd64)	4m 42s
e2e / caa_image_s390x / build and push (release, linux/s390x)	3m 28s
e2e / caa_image_amd64 / build and push (release, linux/amd64)	3m 32s
e2e / image / build and push (dev, linux/amd64)	4m 48s
e2e / image / build and push (release, linux/amd64,linux/s390x,linux/ppc64le)	8m 32s
e2e / podvm_builder / Create pod vm builder image (ubuntu, ubuntu-24.04)	2m 0s
e2e / podvm_mkosi_amd64 / Build mkosi image	8m 34s
e2e / podvm_mkosi_s390x / Build mkosi image	12m 2s
e2e / podvm_binaries / Create pod vm binaries image (ubuntu, amd64)	2m 10s
e2e / podvm_binaries / Create pod vm binaries image (ubuntu, s390x)	2m 1s
e2e / podvm / Create pod vm image (ubuntu, amd64, generic)	9m 12s
e2e / podvm / Create pod vm image (ubuntu, amd64, vsphere)	6m 32s
e2e / podvm / Create pod vm image (ubuntu, s390x, generic)	12m 6s
e2e / E2E tests on libvirt for the amd64 architecture (none) / test	25m 53s
e2e / E2E tests on libvirt for the s390x architecture (none) / test	19m 4s
e2e / libvirt (crio, none, ubuntu, generic, amd64) / test	17m 53s
e2e / libvirt (containerd, none, ubuntu, generic, amd64) / test	17m 53s
	2h 46m 56s

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