RFC: add encrypted scratch space for sandbox #3247

Job	Run time
authorize	1s
e2e / libvirt_e2e_arch_prep	4s
e2e / prep_install	10s
e2e / image / build and push (dev, linux/amd64)	3m 34s
e2e / caa_image_s390x / build and push (dev, linux/s390x)	3m 42s
e2e / caa_image_amd64 / build and push (dev, linux/amd64)	3m 38s
e2e / image / build and push (release, linux/amd64,linux/s390x,linux/ppc64le)	3m 23s
e2e / caa_image_s390x / build and push (release, linux/s390x)	3m 27s
e2e / caa_image_amd64 / build and push (release, linux/amd64)	3m 30s
e2e / podvm_builder / Create pod vm builder image (ubuntu, ubuntu-24.04)	2m 7s
e2e / podvm_mkosi_amd64 / Build mkosi image	3m 25s
e2e / podvm_mkosi_s390x / Build mkosi image	1s
e2e / podvm_binaries / Create pod vm binaries image (ubuntu, amd64)	1m 20s
e2e / podvm_binaries / Create pod vm binaries image (ubuntu, s390x)	1m 26s
e2e / E2E tests on libvirt for the s390x architecture	1s
e2e / E2E tests on libvirt for the amd64 architecture	1s
e2e / podvm	1s
e2e / libvirt	1s
	29m 52s

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